1 /* 2 * QEMU disk image utility 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #include "qemu/osdep.h" 25 #include "qemu-version.h" 26 #include "qapi/error.h" 27 #include "qapi-visit.h" 28 #include "qapi/qmp-output-visitor.h" 29 #include "qapi/qmp/qerror.h" 30 #include "qapi/qmp/qjson.h" 31 #include "qemu/cutils.h" 32 #include "qemu/config-file.h" 33 #include "qemu/option.h" 34 #include "qemu/error-report.h" 35 #include "qom/object_interfaces.h" 36 #include "sysemu/sysemu.h" 37 #include "sysemu/block-backend.h" 38 #include "block/block_int.h" 39 #include "block/blockjob.h" 40 #include "block/qapi.h" 41 #include "crypto/init.h" 42 #include <getopt.h> 43 44 #define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \ 45 ", Copyright (c) 2004-2008 Fabrice Bellard\n" 46 47 typedef struct img_cmd_t { 48 const char *name; 49 int (*handler)(int argc, char **argv); 50 } img_cmd_t; 51 52 enum { 53 OPTION_OUTPUT = 256, 54 OPTION_BACKING_CHAIN = 257, 55 OPTION_OBJECT = 258, 56 OPTION_IMAGE_OPTS = 259, 57 OPTION_PATTERN = 260, 58 OPTION_FLUSH_INTERVAL = 261, 59 OPTION_NO_DRAIN = 262, 60 }; 61 62 typedef enum OutputFormat { 63 OFORMAT_JSON, 64 OFORMAT_HUMAN, 65 } OutputFormat; 66 67 /* Default to cache=writeback as data integrity is not important for qemu-img */ 68 #define BDRV_DEFAULT_CACHE "writeback" 69 70 static void format_print(void *opaque, const char *name) 71 { 72 printf(" %s", name); 73 } 74 75 static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...) 76 { 77 va_list ap; 78 79 error_printf("qemu-img: "); 80 81 va_start(ap, fmt); 82 error_vprintf(fmt, ap); 83 va_end(ap); 84 85 error_printf("\nTry 'qemu-img --help' for more information\n"); 86 exit(EXIT_FAILURE); 87 } 88 89 /* Please keep in synch with qemu-img.texi */ 90 static void QEMU_NORETURN help(void) 91 { 92 const char *help_msg = 93 QEMU_IMG_VERSION 94 "usage: qemu-img command [command options]\n" 95 "QEMU disk image utility\n" 96 "\n" 97 "Command syntax:\n" 98 #define DEF(option, callback, arg_string) \ 99 " " arg_string "\n" 100 #include "qemu-img-cmds.h" 101 #undef DEF 102 #undef GEN_DOCS 103 "\n" 104 "Command parameters:\n" 105 " 'filename' is a disk image filename\n" 106 " 'objectdef' is a QEMU user creatable object definition. See the qemu(1)\n" 107 " manual page for a description of the object properties. The most common\n" 108 " object type is a 'secret', which is used to supply passwords and/or\n" 109 " encryption keys.\n" 110 " 'fmt' is the disk image format. It is guessed automatically in most cases\n" 111 " 'cache' is the cache mode used to write the output disk image, the valid\n" 112 " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n" 113 " 'directsync' and 'unsafe' (default for convert)\n" 114 " 'src_cache' is the cache mode used to read input disk images, the valid\n" 115 " options are the same as for the 'cache' option\n" 116 " 'size' is the disk image size in bytes. Optional suffixes\n" 117 " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n" 118 " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n" 119 " supported. 'b' is ignored.\n" 120 " 'output_filename' is the destination disk image filename\n" 121 " 'output_fmt' is the destination format\n" 122 " 'options' is a comma separated list of format specific options in a\n" 123 " name=value format. Use -o ? for an overview of the options supported by the\n" 124 " used format\n" 125 " 'snapshot_param' is param used for internal snapshot, format\n" 126 " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 127 " '[ID_OR_NAME]'\n" 128 " 'snapshot_id_or_name' is deprecated, use 'snapshot_param'\n" 129 " instead\n" 130 " '-c' indicates that target image must be compressed (qcow format only)\n" 131 " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n" 132 " match exactly. The image doesn't need a working backing file before\n" 133 " rebasing in this case (useful for renaming the backing file)\n" 134 " '-h' with or without a command shows this help and lists the supported formats\n" 135 " '-p' show progress of command (only certain commands)\n" 136 " '-q' use Quiet mode - do not print any output (except errors)\n" 137 " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n" 138 " contain only zeros for qemu-img to create a sparse image during\n" 139 " conversion. If the number of bytes is 0, the source will not be scanned for\n" 140 " unallocated or zero sectors, and the destination image will always be\n" 141 " fully allocated\n" 142 " '--output' takes the format in which the output must be done (human or json)\n" 143 " '-n' skips the target volume creation (useful if the volume is created\n" 144 " prior to running qemu-img)\n" 145 "\n" 146 "Parameters to check subcommand:\n" 147 " '-r' tries to repair any inconsistencies that are found during the check.\n" 148 " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n" 149 " kinds of errors, with a higher risk of choosing the wrong fix or\n" 150 " hiding corruption that has already occurred.\n" 151 "\n" 152 "Parameters to snapshot subcommand:\n" 153 " 'snapshot' is the name of the snapshot to create, apply or delete\n" 154 " '-a' applies a snapshot (revert disk to saved state)\n" 155 " '-c' creates a snapshot\n" 156 " '-d' deletes a snapshot\n" 157 " '-l' lists all snapshots in the given image\n" 158 "\n" 159 "Parameters to compare subcommand:\n" 160 " '-f' first image format\n" 161 " '-F' second image format\n" 162 " '-s' run in Strict mode - fail on different image size or sector allocation\n"; 163 164 printf("%s\nSupported formats:", help_msg); 165 bdrv_iterate_format(format_print, NULL); 166 printf("\n"); 167 exit(EXIT_SUCCESS); 168 } 169 170 static QemuOptsList qemu_object_opts = { 171 .name = "object", 172 .implied_opt_name = "qom-type", 173 .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), 174 .desc = { 175 { } 176 }, 177 }; 178 179 static QemuOptsList qemu_source_opts = { 180 .name = "source", 181 .implied_opt_name = "file", 182 .head = QTAILQ_HEAD_INITIALIZER(qemu_source_opts.head), 183 .desc = { 184 { } 185 }, 186 }; 187 188 static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...) 189 { 190 int ret = 0; 191 if (!quiet) { 192 va_list args; 193 va_start(args, fmt); 194 ret = vprintf(fmt, args); 195 va_end(args); 196 } 197 return ret; 198 } 199 200 201 static int print_block_option_help(const char *filename, const char *fmt) 202 { 203 BlockDriver *drv, *proto_drv; 204 QemuOptsList *create_opts = NULL; 205 Error *local_err = NULL; 206 207 /* Find driver and parse its options */ 208 drv = bdrv_find_format(fmt); 209 if (!drv) { 210 error_report("Unknown file format '%s'", fmt); 211 return 1; 212 } 213 214 create_opts = qemu_opts_append(create_opts, drv->create_opts); 215 if (filename) { 216 proto_drv = bdrv_find_protocol(filename, true, &local_err); 217 if (!proto_drv) { 218 error_report_err(local_err); 219 qemu_opts_free(create_opts); 220 return 1; 221 } 222 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 223 } 224 225 qemu_opts_print_help(create_opts); 226 qemu_opts_free(create_opts); 227 return 0; 228 } 229 230 231 static int img_open_password(BlockBackend *blk, const char *filename, 232 int flags, bool quiet) 233 { 234 BlockDriverState *bs; 235 char password[256]; 236 237 bs = blk_bs(blk); 238 if (bdrv_is_encrypted(bs) && bdrv_key_required(bs) && 239 !(flags & BDRV_O_NO_IO)) { 240 qprintf(quiet, "Disk image '%s' is encrypted.\n", filename); 241 if (qemu_read_password(password, sizeof(password)) < 0) { 242 error_report("No password given"); 243 return -1; 244 } 245 if (bdrv_set_key(bs, password) < 0) { 246 error_report("invalid password"); 247 return -1; 248 } 249 } 250 return 0; 251 } 252 253 254 static BlockBackend *img_open_opts(const char *optstr, 255 QemuOpts *opts, int flags, bool writethrough, 256 bool quiet) 257 { 258 QDict *options; 259 Error *local_err = NULL; 260 BlockBackend *blk; 261 options = qemu_opts_to_qdict(opts, NULL); 262 blk = blk_new_open(NULL, NULL, options, flags, &local_err); 263 if (!blk) { 264 error_reportf_err(local_err, "Could not open '%s': ", optstr); 265 return NULL; 266 } 267 blk_set_enable_write_cache(blk, !writethrough); 268 269 if (img_open_password(blk, optstr, flags, quiet) < 0) { 270 blk_unref(blk); 271 return NULL; 272 } 273 return blk; 274 } 275 276 static BlockBackend *img_open_file(const char *filename, 277 const char *fmt, int flags, 278 bool writethrough, bool quiet) 279 { 280 BlockBackend *blk; 281 Error *local_err = NULL; 282 QDict *options = NULL; 283 284 if (fmt) { 285 options = qdict_new(); 286 qdict_put(options, "driver", qstring_from_str(fmt)); 287 } 288 289 blk = blk_new_open(filename, NULL, options, flags, &local_err); 290 if (!blk) { 291 error_reportf_err(local_err, "Could not open '%s': ", filename); 292 return NULL; 293 } 294 blk_set_enable_write_cache(blk, !writethrough); 295 296 if (img_open_password(blk, filename, flags, quiet) < 0) { 297 blk_unref(blk); 298 return NULL; 299 } 300 return blk; 301 } 302 303 304 static BlockBackend *img_open(bool image_opts, 305 const char *filename, 306 const char *fmt, int flags, bool writethrough, 307 bool quiet) 308 { 309 BlockBackend *blk; 310 if (image_opts) { 311 QemuOpts *opts; 312 if (fmt) { 313 error_report("--image-opts and --format are mutually exclusive"); 314 return NULL; 315 } 316 opts = qemu_opts_parse_noisily(qemu_find_opts("source"), 317 filename, true); 318 if (!opts) { 319 return NULL; 320 } 321 blk = img_open_opts(filename, opts, flags, writethrough, quiet); 322 } else { 323 blk = img_open_file(filename, fmt, flags, writethrough, quiet); 324 } 325 return blk; 326 } 327 328 329 static int add_old_style_options(const char *fmt, QemuOpts *opts, 330 const char *base_filename, 331 const char *base_fmt) 332 { 333 Error *err = NULL; 334 335 if (base_filename) { 336 qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, &err); 337 if (err) { 338 error_report("Backing file not supported for file format '%s'", 339 fmt); 340 error_free(err); 341 return -1; 342 } 343 } 344 if (base_fmt) { 345 qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, &err); 346 if (err) { 347 error_report("Backing file format not supported for file " 348 "format '%s'", fmt); 349 error_free(err); 350 return -1; 351 } 352 } 353 return 0; 354 } 355 356 static int img_create(int argc, char **argv) 357 { 358 int c; 359 uint64_t img_size = -1; 360 const char *fmt = "raw"; 361 const char *base_fmt = NULL; 362 const char *filename; 363 const char *base_filename = NULL; 364 char *options = NULL; 365 Error *local_err = NULL; 366 bool quiet = false; 367 368 for(;;) { 369 static const struct option long_options[] = { 370 {"help", no_argument, 0, 'h'}, 371 {"object", required_argument, 0, OPTION_OBJECT}, 372 {0, 0, 0, 0} 373 }; 374 c = getopt_long(argc, argv, "F:b:f:he6o:q", 375 long_options, NULL); 376 if (c == -1) { 377 break; 378 } 379 switch(c) { 380 case '?': 381 case 'h': 382 help(); 383 break; 384 case 'F': 385 base_fmt = optarg; 386 break; 387 case 'b': 388 base_filename = optarg; 389 break; 390 case 'f': 391 fmt = optarg; 392 break; 393 case 'e': 394 error_report("option -e is deprecated, please use \'-o " 395 "encryption\' instead!"); 396 goto fail; 397 case '6': 398 error_report("option -6 is deprecated, please use \'-o " 399 "compat6\' instead!"); 400 goto fail; 401 case 'o': 402 if (!is_valid_option_list(optarg)) { 403 error_report("Invalid option list: %s", optarg); 404 goto fail; 405 } 406 if (!options) { 407 options = g_strdup(optarg); 408 } else { 409 char *old_options = options; 410 options = g_strdup_printf("%s,%s", options, optarg); 411 g_free(old_options); 412 } 413 break; 414 case 'q': 415 quiet = true; 416 break; 417 case OPTION_OBJECT: { 418 QemuOpts *opts; 419 opts = qemu_opts_parse_noisily(&qemu_object_opts, 420 optarg, true); 421 if (!opts) { 422 goto fail; 423 } 424 } break; 425 } 426 } 427 428 /* Get the filename */ 429 filename = (optind < argc) ? argv[optind] : NULL; 430 if (options && has_help_option(options)) { 431 g_free(options); 432 return print_block_option_help(filename, fmt); 433 } 434 435 if (optind >= argc) { 436 error_exit("Expecting image file name"); 437 } 438 optind++; 439 440 if (qemu_opts_foreach(&qemu_object_opts, 441 user_creatable_add_opts_foreach, 442 NULL, NULL)) { 443 goto fail; 444 } 445 446 /* Get image size, if specified */ 447 if (optind < argc) { 448 int64_t sval; 449 char *end; 450 sval = qemu_strtosz_suffix(argv[optind++], &end, 451 QEMU_STRTOSZ_DEFSUFFIX_B); 452 if (sval < 0 || *end) { 453 if (sval == -ERANGE) { 454 error_report("Image size must be less than 8 EiB!"); 455 } else { 456 error_report("Invalid image size specified! You may use k, M, " 457 "G, T, P or E suffixes for "); 458 error_report("kilobytes, megabytes, gigabytes, terabytes, " 459 "petabytes and exabytes."); 460 } 461 goto fail; 462 } 463 img_size = (uint64_t)sval; 464 } 465 if (optind != argc) { 466 error_exit("Unexpected argument: %s", argv[optind]); 467 } 468 469 bdrv_img_create(filename, fmt, base_filename, base_fmt, 470 options, img_size, 0, &local_err, quiet); 471 if (local_err) { 472 error_reportf_err(local_err, "%s: ", filename); 473 goto fail; 474 } 475 476 g_free(options); 477 return 0; 478 479 fail: 480 g_free(options); 481 return 1; 482 } 483 484 static void dump_json_image_check(ImageCheck *check, bool quiet) 485 { 486 Error *local_err = NULL; 487 QString *str; 488 QmpOutputVisitor *ov = qmp_output_visitor_new(); 489 QObject *obj; 490 visit_type_ImageCheck(qmp_output_get_visitor(ov), NULL, &check, 491 &local_err); 492 obj = qmp_output_get_qobject(ov); 493 str = qobject_to_json_pretty(obj); 494 assert(str != NULL); 495 qprintf(quiet, "%s\n", qstring_get_str(str)); 496 qobject_decref(obj); 497 qmp_output_visitor_cleanup(ov); 498 QDECREF(str); 499 } 500 501 static void dump_human_image_check(ImageCheck *check, bool quiet) 502 { 503 if (!(check->corruptions || check->leaks || check->check_errors)) { 504 qprintf(quiet, "No errors were found on the image.\n"); 505 } else { 506 if (check->corruptions) { 507 qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n" 508 "Data may be corrupted, or further writes to the image " 509 "may corrupt it.\n", 510 check->corruptions); 511 } 512 513 if (check->leaks) { 514 qprintf(quiet, 515 "\n%" PRId64 " leaked clusters were found on the image.\n" 516 "This means waste of disk space, but no harm to data.\n", 517 check->leaks); 518 } 519 520 if (check->check_errors) { 521 qprintf(quiet, 522 "\n%" PRId64 523 " internal errors have occurred during the check.\n", 524 check->check_errors); 525 } 526 } 527 528 if (check->total_clusters != 0 && check->allocated_clusters != 0) { 529 qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, " 530 "%0.2f%% fragmented, %0.2f%% compressed clusters\n", 531 check->allocated_clusters, check->total_clusters, 532 check->allocated_clusters * 100.0 / check->total_clusters, 533 check->fragmented_clusters * 100.0 / check->allocated_clusters, 534 check->compressed_clusters * 100.0 / 535 check->allocated_clusters); 536 } 537 538 if (check->image_end_offset) { 539 qprintf(quiet, 540 "Image end offset: %" PRId64 "\n", check->image_end_offset); 541 } 542 } 543 544 static int collect_image_check(BlockDriverState *bs, 545 ImageCheck *check, 546 const char *filename, 547 const char *fmt, 548 int fix) 549 { 550 int ret; 551 BdrvCheckResult result; 552 553 ret = bdrv_check(bs, &result, fix); 554 if (ret < 0) { 555 return ret; 556 } 557 558 check->filename = g_strdup(filename); 559 check->format = g_strdup(bdrv_get_format_name(bs)); 560 check->check_errors = result.check_errors; 561 check->corruptions = result.corruptions; 562 check->has_corruptions = result.corruptions != 0; 563 check->leaks = result.leaks; 564 check->has_leaks = result.leaks != 0; 565 check->corruptions_fixed = result.corruptions_fixed; 566 check->has_corruptions_fixed = result.corruptions != 0; 567 check->leaks_fixed = result.leaks_fixed; 568 check->has_leaks_fixed = result.leaks != 0; 569 check->image_end_offset = result.image_end_offset; 570 check->has_image_end_offset = result.image_end_offset != 0; 571 check->total_clusters = result.bfi.total_clusters; 572 check->has_total_clusters = result.bfi.total_clusters != 0; 573 check->allocated_clusters = result.bfi.allocated_clusters; 574 check->has_allocated_clusters = result.bfi.allocated_clusters != 0; 575 check->fragmented_clusters = result.bfi.fragmented_clusters; 576 check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0; 577 check->compressed_clusters = result.bfi.compressed_clusters; 578 check->has_compressed_clusters = result.bfi.compressed_clusters != 0; 579 580 return 0; 581 } 582 583 /* 584 * Checks an image for consistency. Exit codes: 585 * 586 * 0 - Check completed, image is good 587 * 1 - Check not completed because of internal errors 588 * 2 - Check completed, image is corrupted 589 * 3 - Check completed, image has leaked clusters, but is good otherwise 590 * 63 - Checks are not supported by the image format 591 */ 592 static int img_check(int argc, char **argv) 593 { 594 int c, ret; 595 OutputFormat output_format = OFORMAT_HUMAN; 596 const char *filename, *fmt, *output, *cache; 597 BlockBackend *blk; 598 BlockDriverState *bs; 599 int fix = 0; 600 int flags = BDRV_O_CHECK; 601 bool writethrough; 602 ImageCheck *check; 603 bool quiet = false; 604 bool image_opts = false; 605 606 fmt = NULL; 607 output = NULL; 608 cache = BDRV_DEFAULT_CACHE; 609 610 for(;;) { 611 int option_index = 0; 612 static const struct option long_options[] = { 613 {"help", no_argument, 0, 'h'}, 614 {"format", required_argument, 0, 'f'}, 615 {"repair", required_argument, 0, 'r'}, 616 {"output", required_argument, 0, OPTION_OUTPUT}, 617 {"object", required_argument, 0, OPTION_OBJECT}, 618 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 619 {0, 0, 0, 0} 620 }; 621 c = getopt_long(argc, argv, "hf:r:T:q", 622 long_options, &option_index); 623 if (c == -1) { 624 break; 625 } 626 switch(c) { 627 case '?': 628 case 'h': 629 help(); 630 break; 631 case 'f': 632 fmt = optarg; 633 break; 634 case 'r': 635 flags |= BDRV_O_RDWR; 636 637 if (!strcmp(optarg, "leaks")) { 638 fix = BDRV_FIX_LEAKS; 639 } else if (!strcmp(optarg, "all")) { 640 fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; 641 } else { 642 error_exit("Unknown option value for -r " 643 "(expecting 'leaks' or 'all'): %s", optarg); 644 } 645 break; 646 case OPTION_OUTPUT: 647 output = optarg; 648 break; 649 case 'T': 650 cache = optarg; 651 break; 652 case 'q': 653 quiet = true; 654 break; 655 case OPTION_OBJECT: { 656 QemuOpts *opts; 657 opts = qemu_opts_parse_noisily(&qemu_object_opts, 658 optarg, true); 659 if (!opts) { 660 return 1; 661 } 662 } break; 663 case OPTION_IMAGE_OPTS: 664 image_opts = true; 665 break; 666 } 667 } 668 if (optind != argc - 1) { 669 error_exit("Expecting one image file name"); 670 } 671 filename = argv[optind++]; 672 673 if (output && !strcmp(output, "json")) { 674 output_format = OFORMAT_JSON; 675 } else if (output && !strcmp(output, "human")) { 676 output_format = OFORMAT_HUMAN; 677 } else if (output) { 678 error_report("--output must be used with human or json as argument."); 679 return 1; 680 } 681 682 if (qemu_opts_foreach(&qemu_object_opts, 683 user_creatable_add_opts_foreach, 684 NULL, NULL)) { 685 return 1; 686 } 687 688 ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); 689 if (ret < 0) { 690 error_report("Invalid source cache option: %s", cache); 691 return 1; 692 } 693 694 blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); 695 if (!blk) { 696 return 1; 697 } 698 bs = blk_bs(blk); 699 700 check = g_new0(ImageCheck, 1); 701 ret = collect_image_check(bs, check, filename, fmt, fix); 702 703 if (ret == -ENOTSUP) { 704 error_report("This image format does not support checks"); 705 ret = 63; 706 goto fail; 707 } 708 709 if (check->corruptions_fixed || check->leaks_fixed) { 710 int corruptions_fixed, leaks_fixed; 711 712 leaks_fixed = check->leaks_fixed; 713 corruptions_fixed = check->corruptions_fixed; 714 715 if (output_format == OFORMAT_HUMAN) { 716 qprintf(quiet, 717 "The following inconsistencies were found and repaired:\n\n" 718 " %" PRId64 " leaked clusters\n" 719 " %" PRId64 " corruptions\n\n" 720 "Double checking the fixed image now...\n", 721 check->leaks_fixed, 722 check->corruptions_fixed); 723 } 724 725 ret = collect_image_check(bs, check, filename, fmt, 0); 726 727 check->leaks_fixed = leaks_fixed; 728 check->corruptions_fixed = corruptions_fixed; 729 } 730 731 if (!ret) { 732 switch (output_format) { 733 case OFORMAT_HUMAN: 734 dump_human_image_check(check, quiet); 735 break; 736 case OFORMAT_JSON: 737 dump_json_image_check(check, quiet); 738 break; 739 } 740 } 741 742 if (ret || check->check_errors) { 743 if (ret) { 744 error_report("Check failed: %s", strerror(-ret)); 745 } else { 746 error_report("Check failed"); 747 } 748 ret = 1; 749 goto fail; 750 } 751 752 if (check->corruptions) { 753 ret = 2; 754 } else if (check->leaks) { 755 ret = 3; 756 } else { 757 ret = 0; 758 } 759 760 fail: 761 qapi_free_ImageCheck(check); 762 blk_unref(blk); 763 return ret; 764 } 765 766 typedef struct CommonBlockJobCBInfo { 767 BlockDriverState *bs; 768 Error **errp; 769 } CommonBlockJobCBInfo; 770 771 static void common_block_job_cb(void *opaque, int ret) 772 { 773 CommonBlockJobCBInfo *cbi = opaque; 774 775 if (ret < 0) { 776 error_setg_errno(cbi->errp, -ret, "Block job failed"); 777 } 778 } 779 780 static void run_block_job(BlockJob *job, Error **errp) 781 { 782 AioContext *aio_context = blk_get_aio_context(job->blk); 783 784 do { 785 aio_poll(aio_context, true); 786 qemu_progress_print(job->len ? 787 ((float)job->offset / job->len * 100.f) : 0.0f, 0); 788 } while (!job->ready); 789 790 block_job_complete_sync(job, errp); 791 792 /* A block job may finish instantaneously without publishing any progress, 793 * so just signal completion here */ 794 qemu_progress_print(100.f, 0); 795 } 796 797 static int img_commit(int argc, char **argv) 798 { 799 int c, ret, flags; 800 const char *filename, *fmt, *cache, *base; 801 BlockBackend *blk; 802 BlockDriverState *bs, *base_bs; 803 bool progress = false, quiet = false, drop = false; 804 bool writethrough; 805 Error *local_err = NULL; 806 CommonBlockJobCBInfo cbi; 807 bool image_opts = false; 808 809 fmt = NULL; 810 cache = BDRV_DEFAULT_CACHE; 811 base = NULL; 812 for(;;) { 813 static const struct option long_options[] = { 814 {"help", no_argument, 0, 'h'}, 815 {"object", required_argument, 0, OPTION_OBJECT}, 816 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 817 {0, 0, 0, 0} 818 }; 819 c = getopt_long(argc, argv, "f:ht:b:dpq", 820 long_options, NULL); 821 if (c == -1) { 822 break; 823 } 824 switch(c) { 825 case '?': 826 case 'h': 827 help(); 828 break; 829 case 'f': 830 fmt = optarg; 831 break; 832 case 't': 833 cache = optarg; 834 break; 835 case 'b': 836 base = optarg; 837 /* -b implies -d */ 838 drop = true; 839 break; 840 case 'd': 841 drop = true; 842 break; 843 case 'p': 844 progress = true; 845 break; 846 case 'q': 847 quiet = true; 848 break; 849 case OPTION_OBJECT: { 850 QemuOpts *opts; 851 opts = qemu_opts_parse_noisily(&qemu_object_opts, 852 optarg, true); 853 if (!opts) { 854 return 1; 855 } 856 } break; 857 case OPTION_IMAGE_OPTS: 858 image_opts = true; 859 break; 860 } 861 } 862 863 /* Progress is not shown in Quiet mode */ 864 if (quiet) { 865 progress = false; 866 } 867 868 if (optind != argc - 1) { 869 error_exit("Expecting one image file name"); 870 } 871 filename = argv[optind++]; 872 873 if (qemu_opts_foreach(&qemu_object_opts, 874 user_creatable_add_opts_foreach, 875 NULL, NULL)) { 876 return 1; 877 } 878 879 flags = BDRV_O_RDWR | BDRV_O_UNMAP; 880 ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); 881 if (ret < 0) { 882 error_report("Invalid cache option: %s", cache); 883 return 1; 884 } 885 886 blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); 887 if (!blk) { 888 return 1; 889 } 890 bs = blk_bs(blk); 891 892 qemu_progress_init(progress, 1.f); 893 qemu_progress_print(0.f, 100); 894 895 if (base) { 896 base_bs = bdrv_find_backing_image(bs, base); 897 if (!base_bs) { 898 error_setg(&local_err, QERR_BASE_NOT_FOUND, base); 899 goto done; 900 } 901 } else { 902 /* This is different from QMP, which by default uses the deepest file in 903 * the backing chain (i.e., the very base); however, the traditional 904 * behavior of qemu-img commit is using the immediate backing file. */ 905 base_bs = backing_bs(bs); 906 if (!base_bs) { 907 error_setg(&local_err, "Image does not have a backing file"); 908 goto done; 909 } 910 } 911 912 cbi = (CommonBlockJobCBInfo){ 913 .errp = &local_err, 914 .bs = bs, 915 }; 916 917 commit_active_start(bs, base_bs, 0, BLOCKDEV_ON_ERROR_REPORT, 918 common_block_job_cb, &cbi, &local_err); 919 if (local_err) { 920 goto done; 921 } 922 923 /* When the block job completes, the BlockBackend reference will point to 924 * the old backing file. In order to avoid that the top image is already 925 * deleted, so we can still empty it afterwards, increment the reference 926 * counter here preemptively. */ 927 if (!drop) { 928 bdrv_ref(bs); 929 } 930 931 run_block_job(bs->job, &local_err); 932 if (local_err) { 933 goto unref_backing; 934 } 935 936 if (!drop && bs->drv->bdrv_make_empty) { 937 ret = bs->drv->bdrv_make_empty(bs); 938 if (ret) { 939 error_setg_errno(&local_err, -ret, "Could not empty %s", 940 filename); 941 goto unref_backing; 942 } 943 } 944 945 unref_backing: 946 if (!drop) { 947 bdrv_unref(bs); 948 } 949 950 done: 951 qemu_progress_end(); 952 953 blk_unref(blk); 954 955 if (local_err) { 956 error_report_err(local_err); 957 return 1; 958 } 959 960 qprintf(quiet, "Image committed.\n"); 961 return 0; 962 } 963 964 /* 965 * Returns true iff the first sector pointed to by 'buf' contains at least 966 * a non-NUL byte. 967 * 968 * 'pnum' is set to the number of sectors (including and immediately following 969 * the first one) that are known to be in the same allocated/unallocated state. 970 */ 971 static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) 972 { 973 bool is_zero; 974 int i; 975 976 if (n <= 0) { 977 *pnum = 0; 978 return 0; 979 } 980 is_zero = buffer_is_zero(buf, 512); 981 for(i = 1; i < n; i++) { 982 buf += 512; 983 if (is_zero != buffer_is_zero(buf, 512)) { 984 break; 985 } 986 } 987 *pnum = i; 988 return !is_zero; 989 } 990 991 /* 992 * Like is_allocated_sectors, but if the buffer starts with a used sector, 993 * up to 'min' consecutive sectors containing zeros are ignored. This avoids 994 * breaking up write requests for only small sparse areas. 995 */ 996 static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, 997 int min) 998 { 999 int ret; 1000 int num_checked, num_used; 1001 1002 if (n < min) { 1003 min = n; 1004 } 1005 1006 ret = is_allocated_sectors(buf, n, pnum); 1007 if (!ret) { 1008 return ret; 1009 } 1010 1011 num_used = *pnum; 1012 buf += BDRV_SECTOR_SIZE * *pnum; 1013 n -= *pnum; 1014 num_checked = num_used; 1015 1016 while (n > 0) { 1017 ret = is_allocated_sectors(buf, n, pnum); 1018 1019 buf += BDRV_SECTOR_SIZE * *pnum; 1020 n -= *pnum; 1021 num_checked += *pnum; 1022 if (ret) { 1023 num_used = num_checked; 1024 } else if (*pnum >= min) { 1025 break; 1026 } 1027 } 1028 1029 *pnum = num_used; 1030 return 1; 1031 } 1032 1033 /* 1034 * Compares two buffers sector by sector. Returns 0 if the first sector of both 1035 * buffers matches, non-zero otherwise. 1036 * 1037 * pnum is set to the number of sectors (including and immediately following 1038 * the first one) that are known to have the same comparison result 1039 */ 1040 static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, 1041 int *pnum) 1042 { 1043 bool res; 1044 int i; 1045 1046 if (n <= 0) { 1047 *pnum = 0; 1048 return 0; 1049 } 1050 1051 res = !!memcmp(buf1, buf2, 512); 1052 for(i = 1; i < n; i++) { 1053 buf1 += 512; 1054 buf2 += 512; 1055 1056 if (!!memcmp(buf1, buf2, 512) != res) { 1057 break; 1058 } 1059 } 1060 1061 *pnum = i; 1062 return res; 1063 } 1064 1065 #define IO_BUF_SIZE (2 * 1024 * 1024) 1066 1067 static int64_t sectors_to_bytes(int64_t sectors) 1068 { 1069 return sectors << BDRV_SECTOR_BITS; 1070 } 1071 1072 static int64_t sectors_to_process(int64_t total, int64_t from) 1073 { 1074 return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS); 1075 } 1076 1077 /* 1078 * Check if passed sectors are empty (not allocated or contain only 0 bytes) 1079 * 1080 * Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero 1081 * data and negative value on error. 1082 * 1083 * @param blk: BlockBackend for the image 1084 * @param sect_num: Number of first sector to check 1085 * @param sect_count: Number of sectors to check 1086 * @param filename: Name of disk file we are checking (logging purpose) 1087 * @param buffer: Allocated buffer for storing read data 1088 * @param quiet: Flag for quiet mode 1089 */ 1090 static int check_empty_sectors(BlockBackend *blk, int64_t sect_num, 1091 int sect_count, const char *filename, 1092 uint8_t *buffer, bool quiet) 1093 { 1094 int pnum, ret = 0; 1095 ret = blk_pread(blk, sect_num << BDRV_SECTOR_BITS, buffer, 1096 sect_count << BDRV_SECTOR_BITS); 1097 if (ret < 0) { 1098 error_report("Error while reading offset %" PRId64 " of %s: %s", 1099 sectors_to_bytes(sect_num), filename, strerror(-ret)); 1100 return ret; 1101 } 1102 ret = is_allocated_sectors(buffer, sect_count, &pnum); 1103 if (ret || pnum != sect_count) { 1104 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 1105 sectors_to_bytes(ret ? sect_num : sect_num + pnum)); 1106 return 1; 1107 } 1108 1109 return 0; 1110 } 1111 1112 /* 1113 * Compares two images. Exit codes: 1114 * 1115 * 0 - Images are identical 1116 * 1 - Images differ 1117 * >1 - Error occurred 1118 */ 1119 static int img_compare(int argc, char **argv) 1120 { 1121 const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2; 1122 BlockBackend *blk1, *blk2; 1123 BlockDriverState *bs1, *bs2; 1124 int64_t total_sectors1, total_sectors2; 1125 uint8_t *buf1 = NULL, *buf2 = NULL; 1126 int pnum1, pnum2; 1127 int allocated1, allocated2; 1128 int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */ 1129 bool progress = false, quiet = false, strict = false; 1130 int flags; 1131 bool writethrough; 1132 int64_t total_sectors; 1133 int64_t sector_num = 0; 1134 int64_t nb_sectors; 1135 int c, pnum; 1136 uint64_t progress_base; 1137 bool image_opts = false; 1138 1139 cache = BDRV_DEFAULT_CACHE; 1140 for (;;) { 1141 static const struct option long_options[] = { 1142 {"help", no_argument, 0, 'h'}, 1143 {"object", required_argument, 0, OPTION_OBJECT}, 1144 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 1145 {0, 0, 0, 0} 1146 }; 1147 c = getopt_long(argc, argv, "hf:F:T:pqs", 1148 long_options, NULL); 1149 if (c == -1) { 1150 break; 1151 } 1152 switch (c) { 1153 case '?': 1154 case 'h': 1155 help(); 1156 break; 1157 case 'f': 1158 fmt1 = optarg; 1159 break; 1160 case 'F': 1161 fmt2 = optarg; 1162 break; 1163 case 'T': 1164 cache = optarg; 1165 break; 1166 case 'p': 1167 progress = true; 1168 break; 1169 case 'q': 1170 quiet = true; 1171 break; 1172 case 's': 1173 strict = true; 1174 break; 1175 case OPTION_OBJECT: { 1176 QemuOpts *opts; 1177 opts = qemu_opts_parse_noisily(&qemu_object_opts, 1178 optarg, true); 1179 if (!opts) { 1180 ret = 2; 1181 goto out4; 1182 } 1183 } break; 1184 case OPTION_IMAGE_OPTS: 1185 image_opts = true; 1186 break; 1187 } 1188 } 1189 1190 /* Progress is not shown in Quiet mode */ 1191 if (quiet) { 1192 progress = false; 1193 } 1194 1195 1196 if (optind != argc - 2) { 1197 error_exit("Expecting two image file names"); 1198 } 1199 filename1 = argv[optind++]; 1200 filename2 = argv[optind++]; 1201 1202 if (qemu_opts_foreach(&qemu_object_opts, 1203 user_creatable_add_opts_foreach, 1204 NULL, NULL)) { 1205 ret = 2; 1206 goto out4; 1207 } 1208 1209 /* Initialize before goto out */ 1210 qemu_progress_init(progress, 2.0); 1211 1212 flags = 0; 1213 ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); 1214 if (ret < 0) { 1215 error_report("Invalid source cache option: %s", cache); 1216 ret = 2; 1217 goto out3; 1218 } 1219 1220 blk1 = img_open(image_opts, filename1, fmt1, flags, writethrough, quiet); 1221 if (!blk1) { 1222 ret = 2; 1223 goto out3; 1224 } 1225 1226 blk2 = img_open(image_opts, filename2, fmt2, flags, writethrough, quiet); 1227 if (!blk2) { 1228 ret = 2; 1229 goto out2; 1230 } 1231 bs1 = blk_bs(blk1); 1232 bs2 = blk_bs(blk2); 1233 1234 buf1 = blk_blockalign(blk1, IO_BUF_SIZE); 1235 buf2 = blk_blockalign(blk2, IO_BUF_SIZE); 1236 total_sectors1 = blk_nb_sectors(blk1); 1237 if (total_sectors1 < 0) { 1238 error_report("Can't get size of %s: %s", 1239 filename1, strerror(-total_sectors1)); 1240 ret = 4; 1241 goto out; 1242 } 1243 total_sectors2 = blk_nb_sectors(blk2); 1244 if (total_sectors2 < 0) { 1245 error_report("Can't get size of %s: %s", 1246 filename2, strerror(-total_sectors2)); 1247 ret = 4; 1248 goto out; 1249 } 1250 total_sectors = MIN(total_sectors1, total_sectors2); 1251 progress_base = MAX(total_sectors1, total_sectors2); 1252 1253 qemu_progress_print(0, 100); 1254 1255 if (strict && total_sectors1 != total_sectors2) { 1256 ret = 1; 1257 qprintf(quiet, "Strict mode: Image size mismatch!\n"); 1258 goto out; 1259 } 1260 1261 for (;;) { 1262 int64_t status1, status2; 1263 BlockDriverState *file; 1264 1265 nb_sectors = sectors_to_process(total_sectors, sector_num); 1266 if (nb_sectors <= 0) { 1267 break; 1268 } 1269 status1 = bdrv_get_block_status_above(bs1, NULL, sector_num, 1270 total_sectors1 - sector_num, 1271 &pnum1, &file); 1272 if (status1 < 0) { 1273 ret = 3; 1274 error_report("Sector allocation test failed for %s", filename1); 1275 goto out; 1276 } 1277 allocated1 = status1 & BDRV_BLOCK_ALLOCATED; 1278 1279 status2 = bdrv_get_block_status_above(bs2, NULL, sector_num, 1280 total_sectors2 - sector_num, 1281 &pnum2, &file); 1282 if (status2 < 0) { 1283 ret = 3; 1284 error_report("Sector allocation test failed for %s", filename2); 1285 goto out; 1286 } 1287 allocated2 = status2 & BDRV_BLOCK_ALLOCATED; 1288 if (pnum1) { 1289 nb_sectors = MIN(nb_sectors, pnum1); 1290 } 1291 if (pnum2) { 1292 nb_sectors = MIN(nb_sectors, pnum2); 1293 } 1294 1295 if (strict) { 1296 if ((status1 & ~BDRV_BLOCK_OFFSET_MASK) != 1297 (status2 & ~BDRV_BLOCK_OFFSET_MASK)) { 1298 ret = 1; 1299 qprintf(quiet, "Strict mode: Offset %" PRId64 1300 " block status mismatch!\n", 1301 sectors_to_bytes(sector_num)); 1302 goto out; 1303 } 1304 } 1305 if ((status1 & BDRV_BLOCK_ZERO) && (status2 & BDRV_BLOCK_ZERO)) { 1306 nb_sectors = MIN(pnum1, pnum2); 1307 } else if (allocated1 == allocated2) { 1308 if (allocated1) { 1309 ret = blk_pread(blk1, sector_num << BDRV_SECTOR_BITS, buf1, 1310 nb_sectors << BDRV_SECTOR_BITS); 1311 if (ret < 0) { 1312 error_report("Error while reading offset %" PRId64 " of %s:" 1313 " %s", sectors_to_bytes(sector_num), filename1, 1314 strerror(-ret)); 1315 ret = 4; 1316 goto out; 1317 } 1318 ret = blk_pread(blk2, sector_num << BDRV_SECTOR_BITS, buf2, 1319 nb_sectors << BDRV_SECTOR_BITS); 1320 if (ret < 0) { 1321 error_report("Error while reading offset %" PRId64 1322 " of %s: %s", sectors_to_bytes(sector_num), 1323 filename2, strerror(-ret)); 1324 ret = 4; 1325 goto out; 1326 } 1327 ret = compare_sectors(buf1, buf2, nb_sectors, &pnum); 1328 if (ret || pnum != nb_sectors) { 1329 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 1330 sectors_to_bytes( 1331 ret ? sector_num : sector_num + pnum)); 1332 ret = 1; 1333 goto out; 1334 } 1335 } 1336 } else { 1337 1338 if (allocated1) { 1339 ret = check_empty_sectors(blk1, sector_num, nb_sectors, 1340 filename1, buf1, quiet); 1341 } else { 1342 ret = check_empty_sectors(blk2, sector_num, nb_sectors, 1343 filename2, buf1, quiet); 1344 } 1345 if (ret) { 1346 if (ret < 0) { 1347 error_report("Error while reading offset %" PRId64 ": %s", 1348 sectors_to_bytes(sector_num), strerror(-ret)); 1349 ret = 4; 1350 } 1351 goto out; 1352 } 1353 } 1354 sector_num += nb_sectors; 1355 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1356 } 1357 1358 if (total_sectors1 != total_sectors2) { 1359 BlockBackend *blk_over; 1360 int64_t total_sectors_over; 1361 const char *filename_over; 1362 1363 qprintf(quiet, "Warning: Image size mismatch!\n"); 1364 if (total_sectors1 > total_sectors2) { 1365 total_sectors_over = total_sectors1; 1366 blk_over = blk1; 1367 filename_over = filename1; 1368 } else { 1369 total_sectors_over = total_sectors2; 1370 blk_over = blk2; 1371 filename_over = filename2; 1372 } 1373 1374 for (;;) { 1375 nb_sectors = sectors_to_process(total_sectors_over, sector_num); 1376 if (nb_sectors <= 0) { 1377 break; 1378 } 1379 ret = bdrv_is_allocated_above(blk_bs(blk_over), NULL, sector_num, 1380 nb_sectors, &pnum); 1381 if (ret < 0) { 1382 ret = 3; 1383 error_report("Sector allocation test failed for %s", 1384 filename_over); 1385 goto out; 1386 1387 } 1388 nb_sectors = pnum; 1389 if (ret) { 1390 ret = check_empty_sectors(blk_over, sector_num, nb_sectors, 1391 filename_over, buf1, quiet); 1392 if (ret) { 1393 if (ret < 0) { 1394 error_report("Error while reading offset %" PRId64 1395 " of %s: %s", sectors_to_bytes(sector_num), 1396 filename_over, strerror(-ret)); 1397 ret = 4; 1398 } 1399 goto out; 1400 } 1401 } 1402 sector_num += nb_sectors; 1403 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1404 } 1405 } 1406 1407 qprintf(quiet, "Images are identical.\n"); 1408 ret = 0; 1409 1410 out: 1411 qemu_vfree(buf1); 1412 qemu_vfree(buf2); 1413 blk_unref(blk2); 1414 out2: 1415 blk_unref(blk1); 1416 out3: 1417 qemu_progress_end(); 1418 out4: 1419 return ret; 1420 } 1421 1422 enum ImgConvertBlockStatus { 1423 BLK_DATA, 1424 BLK_ZERO, 1425 BLK_BACKING_FILE, 1426 }; 1427 1428 typedef struct ImgConvertState { 1429 BlockBackend **src; 1430 int64_t *src_sectors; 1431 int src_cur, src_num; 1432 int64_t src_cur_offset; 1433 int64_t total_sectors; 1434 int64_t allocated_sectors; 1435 enum ImgConvertBlockStatus status; 1436 int64_t sector_next_status; 1437 BlockBackend *target; 1438 bool has_zero_init; 1439 bool compressed; 1440 bool target_has_backing; 1441 int min_sparse; 1442 size_t cluster_sectors; 1443 size_t buf_sectors; 1444 } ImgConvertState; 1445 1446 static void convert_select_part(ImgConvertState *s, int64_t sector_num) 1447 { 1448 assert(sector_num >= s->src_cur_offset); 1449 while (sector_num - s->src_cur_offset >= s->src_sectors[s->src_cur]) { 1450 s->src_cur_offset += s->src_sectors[s->src_cur]; 1451 s->src_cur++; 1452 assert(s->src_cur < s->src_num); 1453 } 1454 } 1455 1456 static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num) 1457 { 1458 int64_t ret; 1459 int n; 1460 1461 convert_select_part(s, sector_num); 1462 1463 assert(s->total_sectors > sector_num); 1464 n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS); 1465 1466 if (s->sector_next_status <= sector_num) { 1467 BlockDriverState *file; 1468 ret = bdrv_get_block_status(blk_bs(s->src[s->src_cur]), 1469 sector_num - s->src_cur_offset, 1470 n, &n, &file); 1471 if (ret < 0) { 1472 return ret; 1473 } 1474 1475 if (ret & BDRV_BLOCK_ZERO) { 1476 s->status = BLK_ZERO; 1477 } else if (ret & BDRV_BLOCK_DATA) { 1478 s->status = BLK_DATA; 1479 } else if (!s->target_has_backing) { 1480 /* Without a target backing file we must copy over the contents of 1481 * the backing file as well. */ 1482 /* Check block status of the backing file chain to avoid 1483 * needlessly reading zeroes and limiting the iteration to the 1484 * buffer size */ 1485 ret = bdrv_get_block_status_above(blk_bs(s->src[s->src_cur]), NULL, 1486 sector_num - s->src_cur_offset, 1487 n, &n, &file); 1488 if (ret < 0) { 1489 return ret; 1490 } 1491 1492 if (ret & BDRV_BLOCK_ZERO) { 1493 s->status = BLK_ZERO; 1494 } else { 1495 s->status = BLK_DATA; 1496 } 1497 } else { 1498 s->status = BLK_BACKING_FILE; 1499 } 1500 1501 s->sector_next_status = sector_num + n; 1502 } 1503 1504 n = MIN(n, s->sector_next_status - sector_num); 1505 if (s->status == BLK_DATA) { 1506 n = MIN(n, s->buf_sectors); 1507 } 1508 1509 /* We need to write complete clusters for compressed images, so if an 1510 * unallocated area is shorter than that, we must consider the whole 1511 * cluster allocated. */ 1512 if (s->compressed) { 1513 if (n < s->cluster_sectors) { 1514 n = MIN(s->cluster_sectors, s->total_sectors - sector_num); 1515 s->status = BLK_DATA; 1516 } else { 1517 n = QEMU_ALIGN_DOWN(n, s->cluster_sectors); 1518 } 1519 } 1520 1521 return n; 1522 } 1523 1524 static int convert_read(ImgConvertState *s, int64_t sector_num, int nb_sectors, 1525 uint8_t *buf) 1526 { 1527 int n; 1528 int ret; 1529 1530 assert(nb_sectors <= s->buf_sectors); 1531 while (nb_sectors > 0) { 1532 BlockBackend *blk; 1533 int64_t bs_sectors; 1534 1535 /* In the case of compression with multiple source files, we can get a 1536 * nb_sectors that spreads into the next part. So we must be able to 1537 * read across multiple BDSes for one convert_read() call. */ 1538 convert_select_part(s, sector_num); 1539 blk = s->src[s->src_cur]; 1540 bs_sectors = s->src_sectors[s->src_cur]; 1541 1542 n = MIN(nb_sectors, bs_sectors - (sector_num - s->src_cur_offset)); 1543 ret = blk_pread(blk, 1544 (sector_num - s->src_cur_offset) << BDRV_SECTOR_BITS, 1545 buf, n << BDRV_SECTOR_BITS); 1546 if (ret < 0) { 1547 return ret; 1548 } 1549 1550 sector_num += n; 1551 nb_sectors -= n; 1552 buf += n * BDRV_SECTOR_SIZE; 1553 } 1554 1555 return 0; 1556 } 1557 1558 static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors, 1559 const uint8_t *buf) 1560 { 1561 int ret; 1562 1563 while (nb_sectors > 0) { 1564 int n = nb_sectors; 1565 1566 switch (s->status) { 1567 case BLK_BACKING_FILE: 1568 /* If we have a backing file, leave clusters unallocated that are 1569 * unallocated in the source image, so that the backing file is 1570 * visible at the respective offset. */ 1571 assert(s->target_has_backing); 1572 break; 1573 1574 case BLK_DATA: 1575 /* We must always write compressed clusters as a whole, so don't 1576 * try to find zeroed parts in the buffer. We can only save the 1577 * write if the buffer is completely zeroed and we're allowed to 1578 * keep the target sparse. */ 1579 if (s->compressed) { 1580 if (s->has_zero_init && s->min_sparse && 1581 buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) 1582 { 1583 assert(!s->target_has_backing); 1584 break; 1585 } 1586 1587 ret = blk_write_compressed(s->target, sector_num, buf, n); 1588 if (ret < 0) { 1589 return ret; 1590 } 1591 break; 1592 } 1593 1594 /* If there is real non-zero data or we're told to keep the target 1595 * fully allocated (-S 0), we must write it. Otherwise we can treat 1596 * it as zero sectors. */ 1597 if (!s->min_sparse || 1598 is_allocated_sectors_min(buf, n, &n, s->min_sparse)) 1599 { 1600 ret = blk_pwrite(s->target, sector_num << BDRV_SECTOR_BITS, 1601 buf, n << BDRV_SECTOR_BITS, 0); 1602 if (ret < 0) { 1603 return ret; 1604 } 1605 break; 1606 } 1607 /* fall-through */ 1608 1609 case BLK_ZERO: 1610 if (s->has_zero_init) { 1611 break; 1612 } 1613 ret = blk_pwrite_zeroes(s->target, sector_num << BDRV_SECTOR_BITS, 1614 n << BDRV_SECTOR_BITS, 0); 1615 if (ret < 0) { 1616 return ret; 1617 } 1618 break; 1619 } 1620 1621 sector_num += n; 1622 nb_sectors -= n; 1623 buf += n * BDRV_SECTOR_SIZE; 1624 } 1625 1626 return 0; 1627 } 1628 1629 static int convert_do_copy(ImgConvertState *s) 1630 { 1631 uint8_t *buf = NULL; 1632 int64_t sector_num, allocated_done; 1633 int ret; 1634 int n; 1635 1636 /* Check whether we have zero initialisation or can get it efficiently */ 1637 s->has_zero_init = s->min_sparse && !s->target_has_backing 1638 ? bdrv_has_zero_init(blk_bs(s->target)) 1639 : false; 1640 1641 if (!s->has_zero_init && !s->target_has_backing && 1642 bdrv_can_write_zeroes_with_unmap(blk_bs(s->target))) 1643 { 1644 ret = bdrv_make_zero(blk_bs(s->target), BDRV_REQ_MAY_UNMAP); 1645 if (ret == 0) { 1646 s->has_zero_init = true; 1647 } 1648 } 1649 1650 /* Allocate buffer for copied data. For compressed images, only one cluster 1651 * can be copied at a time. */ 1652 if (s->compressed) { 1653 if (s->cluster_sectors <= 0 || s->cluster_sectors > s->buf_sectors) { 1654 error_report("invalid cluster size"); 1655 ret = -EINVAL; 1656 goto fail; 1657 } 1658 s->buf_sectors = s->cluster_sectors; 1659 } 1660 buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE); 1661 1662 /* Calculate allocated sectors for progress */ 1663 s->allocated_sectors = 0; 1664 sector_num = 0; 1665 while (sector_num < s->total_sectors) { 1666 n = convert_iteration_sectors(s, sector_num); 1667 if (n < 0) { 1668 ret = n; 1669 goto fail; 1670 } 1671 if (s->status == BLK_DATA || (!s->min_sparse && s->status == BLK_ZERO)) 1672 { 1673 s->allocated_sectors += n; 1674 } 1675 sector_num += n; 1676 } 1677 1678 /* Do the copy */ 1679 s->src_cur = 0; 1680 s->src_cur_offset = 0; 1681 s->sector_next_status = 0; 1682 1683 sector_num = 0; 1684 allocated_done = 0; 1685 1686 while (sector_num < s->total_sectors) { 1687 n = convert_iteration_sectors(s, sector_num); 1688 if (n < 0) { 1689 ret = n; 1690 goto fail; 1691 } 1692 if (s->status == BLK_DATA || (!s->min_sparse && s->status == BLK_ZERO)) 1693 { 1694 allocated_done += n; 1695 qemu_progress_print(100.0 * allocated_done / s->allocated_sectors, 1696 0); 1697 } 1698 1699 if (s->status == BLK_DATA) { 1700 ret = convert_read(s, sector_num, n, buf); 1701 if (ret < 0) { 1702 error_report("error while reading sector %" PRId64 1703 ": %s", sector_num, strerror(-ret)); 1704 goto fail; 1705 } 1706 } else if (!s->min_sparse && s->status == BLK_ZERO) { 1707 n = MIN(n, s->buf_sectors); 1708 memset(buf, 0, n * BDRV_SECTOR_SIZE); 1709 s->status = BLK_DATA; 1710 } 1711 1712 ret = convert_write(s, sector_num, n, buf); 1713 if (ret < 0) { 1714 error_report("error while writing sector %" PRId64 1715 ": %s", sector_num, strerror(-ret)); 1716 goto fail; 1717 } 1718 1719 sector_num += n; 1720 } 1721 1722 if (s->compressed) { 1723 /* signal EOF to align */ 1724 ret = blk_write_compressed(s->target, 0, NULL, 0); 1725 if (ret < 0) { 1726 goto fail; 1727 } 1728 } 1729 1730 ret = 0; 1731 fail: 1732 qemu_vfree(buf); 1733 return ret; 1734 } 1735 1736 static int img_convert(int argc, char **argv) 1737 { 1738 int c, bs_n, bs_i, compress, cluster_sectors, skip_create; 1739 int64_t ret = 0; 1740 int progress = 0, flags, src_flags; 1741 bool writethrough, src_writethrough; 1742 const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename; 1743 BlockDriver *drv, *proto_drv; 1744 BlockBackend **blk = NULL, *out_blk = NULL; 1745 BlockDriverState **bs = NULL, *out_bs = NULL; 1746 int64_t total_sectors; 1747 int64_t *bs_sectors = NULL; 1748 size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE; 1749 BlockDriverInfo bdi; 1750 QemuOpts *opts = NULL; 1751 QemuOptsList *create_opts = NULL; 1752 const char *out_baseimg_param; 1753 char *options = NULL; 1754 const char *snapshot_name = NULL; 1755 int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ 1756 bool quiet = false; 1757 Error *local_err = NULL; 1758 QemuOpts *sn_opts = NULL; 1759 ImgConvertState state; 1760 bool image_opts = false; 1761 1762 fmt = NULL; 1763 out_fmt = "raw"; 1764 cache = "unsafe"; 1765 src_cache = BDRV_DEFAULT_CACHE; 1766 out_baseimg = NULL; 1767 compress = 0; 1768 skip_create = 0; 1769 for(;;) { 1770 static const struct option long_options[] = { 1771 {"help", no_argument, 0, 'h'}, 1772 {"object", required_argument, 0, OPTION_OBJECT}, 1773 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 1774 {0, 0, 0, 0} 1775 }; 1776 c = getopt_long(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn", 1777 long_options, NULL); 1778 if (c == -1) { 1779 break; 1780 } 1781 switch(c) { 1782 case '?': 1783 case 'h': 1784 help(); 1785 break; 1786 case 'f': 1787 fmt = optarg; 1788 break; 1789 case 'O': 1790 out_fmt = optarg; 1791 break; 1792 case 'B': 1793 out_baseimg = optarg; 1794 break; 1795 case 'c': 1796 compress = 1; 1797 break; 1798 case 'e': 1799 error_report("option -e is deprecated, please use \'-o " 1800 "encryption\' instead!"); 1801 ret = -1; 1802 goto fail_getopt; 1803 case '6': 1804 error_report("option -6 is deprecated, please use \'-o " 1805 "compat6\' instead!"); 1806 ret = -1; 1807 goto fail_getopt; 1808 case 'o': 1809 if (!is_valid_option_list(optarg)) { 1810 error_report("Invalid option list: %s", optarg); 1811 ret = -1; 1812 goto fail_getopt; 1813 } 1814 if (!options) { 1815 options = g_strdup(optarg); 1816 } else { 1817 char *old_options = options; 1818 options = g_strdup_printf("%s,%s", options, optarg); 1819 g_free(old_options); 1820 } 1821 break; 1822 case 's': 1823 snapshot_name = optarg; 1824 break; 1825 case 'l': 1826 if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 1827 sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 1828 optarg, false); 1829 if (!sn_opts) { 1830 error_report("Failed in parsing snapshot param '%s'", 1831 optarg); 1832 ret = -1; 1833 goto fail_getopt; 1834 } 1835 } else { 1836 snapshot_name = optarg; 1837 } 1838 break; 1839 case 'S': 1840 { 1841 int64_t sval; 1842 char *end; 1843 sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); 1844 if (sval < 0 || *end) { 1845 error_report("Invalid minimum zero buffer size for sparse output specified"); 1846 ret = -1; 1847 goto fail_getopt; 1848 } 1849 1850 min_sparse = sval / BDRV_SECTOR_SIZE; 1851 break; 1852 } 1853 case 'p': 1854 progress = 1; 1855 break; 1856 case 't': 1857 cache = optarg; 1858 break; 1859 case 'T': 1860 src_cache = optarg; 1861 break; 1862 case 'q': 1863 quiet = true; 1864 break; 1865 case 'n': 1866 skip_create = 1; 1867 break; 1868 case OPTION_OBJECT: 1869 opts = qemu_opts_parse_noisily(&qemu_object_opts, 1870 optarg, true); 1871 if (!opts) { 1872 goto fail_getopt; 1873 } 1874 break; 1875 case OPTION_IMAGE_OPTS: 1876 image_opts = true; 1877 break; 1878 } 1879 } 1880 1881 if (qemu_opts_foreach(&qemu_object_opts, 1882 user_creatable_add_opts_foreach, 1883 NULL, NULL)) { 1884 goto fail_getopt; 1885 } 1886 1887 /* Initialize before goto out */ 1888 if (quiet) { 1889 progress = 0; 1890 } 1891 qemu_progress_init(progress, 1.0); 1892 1893 bs_n = argc - optind - 1; 1894 out_filename = bs_n >= 1 ? argv[argc - 1] : NULL; 1895 1896 if (options && has_help_option(options)) { 1897 ret = print_block_option_help(out_filename, out_fmt); 1898 goto out; 1899 } 1900 1901 if (bs_n < 1) { 1902 error_exit("Must specify image file name"); 1903 } 1904 1905 1906 if (bs_n > 1 && out_baseimg) { 1907 error_report("-B makes no sense when concatenating multiple input " 1908 "images"); 1909 ret = -1; 1910 goto out; 1911 } 1912 1913 src_flags = 0; 1914 ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough); 1915 if (ret < 0) { 1916 error_report("Invalid source cache option: %s", src_cache); 1917 goto out; 1918 } 1919 1920 qemu_progress_print(0, 100); 1921 1922 blk = g_new0(BlockBackend *, bs_n); 1923 bs = g_new0(BlockDriverState *, bs_n); 1924 bs_sectors = g_new(int64_t, bs_n); 1925 1926 total_sectors = 0; 1927 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1928 blk[bs_i] = img_open(image_opts, argv[optind + bs_i], 1929 fmt, src_flags, src_writethrough, quiet); 1930 if (!blk[bs_i]) { 1931 ret = -1; 1932 goto out; 1933 } 1934 bs[bs_i] = blk_bs(blk[bs_i]); 1935 bs_sectors[bs_i] = blk_nb_sectors(blk[bs_i]); 1936 if (bs_sectors[bs_i] < 0) { 1937 error_report("Could not get size of %s: %s", 1938 argv[optind + bs_i], strerror(-bs_sectors[bs_i])); 1939 ret = -1; 1940 goto out; 1941 } 1942 total_sectors += bs_sectors[bs_i]; 1943 } 1944 1945 if (sn_opts) { 1946 ret = bdrv_snapshot_load_tmp(bs[0], 1947 qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 1948 qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 1949 &local_err); 1950 } else if (snapshot_name != NULL) { 1951 if (bs_n > 1) { 1952 error_report("No support for concatenating multiple snapshot"); 1953 ret = -1; 1954 goto out; 1955 } 1956 1957 bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err); 1958 } 1959 if (local_err) { 1960 error_reportf_err(local_err, "Failed to load snapshot: "); 1961 ret = -1; 1962 goto out; 1963 } 1964 1965 /* Find driver and parse its options */ 1966 drv = bdrv_find_format(out_fmt); 1967 if (!drv) { 1968 error_report("Unknown file format '%s'", out_fmt); 1969 ret = -1; 1970 goto out; 1971 } 1972 1973 proto_drv = bdrv_find_protocol(out_filename, true, &local_err); 1974 if (!proto_drv) { 1975 error_report_err(local_err); 1976 ret = -1; 1977 goto out; 1978 } 1979 1980 if (!skip_create) { 1981 if (!drv->create_opts) { 1982 error_report("Format driver '%s' does not support image creation", 1983 drv->format_name); 1984 ret = -1; 1985 goto out; 1986 } 1987 1988 if (!proto_drv->create_opts) { 1989 error_report("Protocol driver '%s' does not support image creation", 1990 proto_drv->format_name); 1991 ret = -1; 1992 goto out; 1993 } 1994 1995 create_opts = qemu_opts_append(create_opts, drv->create_opts); 1996 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 1997 1998 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 1999 if (options) { 2000 qemu_opts_do_parse(opts, options, NULL, &local_err); 2001 if (local_err) { 2002 error_report_err(local_err); 2003 ret = -1; 2004 goto out; 2005 } 2006 } 2007 2008 qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512, 2009 &error_abort); 2010 ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL); 2011 if (ret < 0) { 2012 goto out; 2013 } 2014 } 2015 2016 /* Get backing file name if -o backing_file was used */ 2017 out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); 2018 if (out_baseimg_param) { 2019 out_baseimg = out_baseimg_param; 2020 } 2021 2022 /* Check if compression is supported */ 2023 if (compress) { 2024 bool encryption = 2025 qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); 2026 const char *preallocation = 2027 qemu_opt_get(opts, BLOCK_OPT_PREALLOC); 2028 2029 if (!drv->bdrv_write_compressed) { 2030 error_report("Compression not supported for this file format"); 2031 ret = -1; 2032 goto out; 2033 } 2034 2035 if (encryption) { 2036 error_report("Compression and encryption not supported at " 2037 "the same time"); 2038 ret = -1; 2039 goto out; 2040 } 2041 2042 if (preallocation 2043 && strcmp(preallocation, "off")) 2044 { 2045 error_report("Compression and preallocation not supported at " 2046 "the same time"); 2047 ret = -1; 2048 goto out; 2049 } 2050 } 2051 2052 if (!skip_create) { 2053 /* Create the new image */ 2054 ret = bdrv_create(drv, out_filename, opts, &local_err); 2055 if (ret < 0) { 2056 error_reportf_err(local_err, "%s: error while converting %s: ", 2057 out_filename, out_fmt); 2058 goto out; 2059 } 2060 } 2061 2062 flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; 2063 ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); 2064 if (ret < 0) { 2065 error_report("Invalid cache option: %s", cache); 2066 goto out; 2067 } 2068 2069 /* XXX we should allow --image-opts to trigger use of 2070 * img_open() here, but then we have trouble with 2071 * the bdrv_create() call which takes different params. 2072 * Not critical right now, so fix can wait... 2073 */ 2074 out_blk = img_open_file(out_filename, out_fmt, flags, writethrough, quiet); 2075 if (!out_blk) { 2076 ret = -1; 2077 goto out; 2078 } 2079 out_bs = blk_bs(out_blk); 2080 2081 /* increase bufsectors from the default 4096 (2M) if opt_transfer_length 2082 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB) 2083 * as maximum. */ 2084 bufsectors = MIN(32768, 2085 MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length, 2086 out_bs->bl.discard_alignment)) 2087 ); 2088 2089 if (skip_create) { 2090 int64_t output_sectors = blk_nb_sectors(out_blk); 2091 if (output_sectors < 0) { 2092 error_report("unable to get output image length: %s", 2093 strerror(-output_sectors)); 2094 ret = -1; 2095 goto out; 2096 } else if (output_sectors < total_sectors) { 2097 error_report("output file is smaller than input file"); 2098 ret = -1; 2099 goto out; 2100 } 2101 } 2102 2103 cluster_sectors = 0; 2104 ret = bdrv_get_info(out_bs, &bdi); 2105 if (ret < 0) { 2106 if (compress) { 2107 error_report("could not get block driver info"); 2108 goto out; 2109 } 2110 } else { 2111 compress = compress || bdi.needs_compressed_writes; 2112 cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; 2113 } 2114 2115 state = (ImgConvertState) { 2116 .src = blk, 2117 .src_sectors = bs_sectors, 2118 .src_num = bs_n, 2119 .total_sectors = total_sectors, 2120 .target = out_blk, 2121 .compressed = compress, 2122 .target_has_backing = (bool) out_baseimg, 2123 .min_sparse = min_sparse, 2124 .cluster_sectors = cluster_sectors, 2125 .buf_sectors = bufsectors, 2126 }; 2127 ret = convert_do_copy(&state); 2128 2129 out: 2130 if (!ret) { 2131 qemu_progress_print(100, 0); 2132 } 2133 qemu_progress_end(); 2134 qemu_opts_del(opts); 2135 qemu_opts_free(create_opts); 2136 qemu_opts_del(sn_opts); 2137 blk_unref(out_blk); 2138 g_free(bs); 2139 if (blk) { 2140 for (bs_i = 0; bs_i < bs_n; bs_i++) { 2141 blk_unref(blk[bs_i]); 2142 } 2143 g_free(blk); 2144 } 2145 g_free(bs_sectors); 2146 fail_getopt: 2147 g_free(options); 2148 2149 if (ret) { 2150 return 1; 2151 } 2152 return 0; 2153 } 2154 2155 2156 static void dump_snapshots(BlockDriverState *bs) 2157 { 2158 QEMUSnapshotInfo *sn_tab, *sn; 2159 int nb_sns, i; 2160 2161 nb_sns = bdrv_snapshot_list(bs, &sn_tab); 2162 if (nb_sns <= 0) 2163 return; 2164 printf("Snapshot list:\n"); 2165 bdrv_snapshot_dump(fprintf, stdout, NULL); 2166 printf("\n"); 2167 for(i = 0; i < nb_sns; i++) { 2168 sn = &sn_tab[i]; 2169 bdrv_snapshot_dump(fprintf, stdout, sn); 2170 printf("\n"); 2171 } 2172 g_free(sn_tab); 2173 } 2174 2175 static void dump_json_image_info_list(ImageInfoList *list) 2176 { 2177 Error *local_err = NULL; 2178 QString *str; 2179 QmpOutputVisitor *ov = qmp_output_visitor_new(); 2180 QObject *obj; 2181 visit_type_ImageInfoList(qmp_output_get_visitor(ov), NULL, &list, 2182 &local_err); 2183 obj = qmp_output_get_qobject(ov); 2184 str = qobject_to_json_pretty(obj); 2185 assert(str != NULL); 2186 printf("%s\n", qstring_get_str(str)); 2187 qobject_decref(obj); 2188 qmp_output_visitor_cleanup(ov); 2189 QDECREF(str); 2190 } 2191 2192 static void dump_json_image_info(ImageInfo *info) 2193 { 2194 Error *local_err = NULL; 2195 QString *str; 2196 QmpOutputVisitor *ov = qmp_output_visitor_new(); 2197 QObject *obj; 2198 visit_type_ImageInfo(qmp_output_get_visitor(ov), NULL, &info, &local_err); 2199 obj = qmp_output_get_qobject(ov); 2200 str = qobject_to_json_pretty(obj); 2201 assert(str != NULL); 2202 printf("%s\n", qstring_get_str(str)); 2203 qobject_decref(obj); 2204 qmp_output_visitor_cleanup(ov); 2205 QDECREF(str); 2206 } 2207 2208 static void dump_human_image_info_list(ImageInfoList *list) 2209 { 2210 ImageInfoList *elem; 2211 bool delim = false; 2212 2213 for (elem = list; elem; elem = elem->next) { 2214 if (delim) { 2215 printf("\n"); 2216 } 2217 delim = true; 2218 2219 bdrv_image_info_dump(fprintf, stdout, elem->value); 2220 } 2221 } 2222 2223 static gboolean str_equal_func(gconstpointer a, gconstpointer b) 2224 { 2225 return strcmp(a, b) == 0; 2226 } 2227 2228 /** 2229 * Open an image file chain and return an ImageInfoList 2230 * 2231 * @filename: topmost image filename 2232 * @fmt: topmost image format (may be NULL to autodetect) 2233 * @chain: true - enumerate entire backing file chain 2234 * false - only topmost image file 2235 * 2236 * Returns a list of ImageInfo objects or NULL if there was an error opening an 2237 * image file. If there was an error a message will have been printed to 2238 * stderr. 2239 */ 2240 static ImageInfoList *collect_image_info_list(bool image_opts, 2241 const char *filename, 2242 const char *fmt, 2243 bool chain) 2244 { 2245 ImageInfoList *head = NULL; 2246 ImageInfoList **last = &head; 2247 GHashTable *filenames; 2248 Error *err = NULL; 2249 2250 filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); 2251 2252 while (filename) { 2253 BlockBackend *blk; 2254 BlockDriverState *bs; 2255 ImageInfo *info; 2256 ImageInfoList *elem; 2257 2258 if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { 2259 error_report("Backing file '%s' creates an infinite loop.", 2260 filename); 2261 goto err; 2262 } 2263 g_hash_table_insert(filenames, (gpointer)filename, NULL); 2264 2265 blk = img_open(image_opts, filename, fmt, 2266 BDRV_O_NO_BACKING | BDRV_O_NO_IO, false, false); 2267 if (!blk) { 2268 goto err; 2269 } 2270 bs = blk_bs(blk); 2271 2272 bdrv_query_image_info(bs, &info, &err); 2273 if (err) { 2274 error_report_err(err); 2275 blk_unref(blk); 2276 goto err; 2277 } 2278 2279 elem = g_new0(ImageInfoList, 1); 2280 elem->value = info; 2281 *last = elem; 2282 last = &elem->next; 2283 2284 blk_unref(blk); 2285 2286 filename = fmt = NULL; 2287 if (chain) { 2288 if (info->has_full_backing_filename) { 2289 filename = info->full_backing_filename; 2290 } else if (info->has_backing_filename) { 2291 error_report("Could not determine absolute backing filename," 2292 " but backing filename '%s' present", 2293 info->backing_filename); 2294 goto err; 2295 } 2296 if (info->has_backing_filename_format) { 2297 fmt = info->backing_filename_format; 2298 } 2299 } 2300 } 2301 g_hash_table_destroy(filenames); 2302 return head; 2303 2304 err: 2305 qapi_free_ImageInfoList(head); 2306 g_hash_table_destroy(filenames); 2307 return NULL; 2308 } 2309 2310 static int img_info(int argc, char **argv) 2311 { 2312 int c; 2313 OutputFormat output_format = OFORMAT_HUMAN; 2314 bool chain = false; 2315 const char *filename, *fmt, *output; 2316 ImageInfoList *list; 2317 bool image_opts = false; 2318 2319 fmt = NULL; 2320 output = NULL; 2321 for(;;) { 2322 int option_index = 0; 2323 static const struct option long_options[] = { 2324 {"help", no_argument, 0, 'h'}, 2325 {"format", required_argument, 0, 'f'}, 2326 {"output", required_argument, 0, OPTION_OUTPUT}, 2327 {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, 2328 {"object", required_argument, 0, OPTION_OBJECT}, 2329 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 2330 {0, 0, 0, 0} 2331 }; 2332 c = getopt_long(argc, argv, "f:h", 2333 long_options, &option_index); 2334 if (c == -1) { 2335 break; 2336 } 2337 switch(c) { 2338 case '?': 2339 case 'h': 2340 help(); 2341 break; 2342 case 'f': 2343 fmt = optarg; 2344 break; 2345 case OPTION_OUTPUT: 2346 output = optarg; 2347 break; 2348 case OPTION_BACKING_CHAIN: 2349 chain = true; 2350 break; 2351 case OPTION_OBJECT: { 2352 QemuOpts *opts; 2353 opts = qemu_opts_parse_noisily(&qemu_object_opts, 2354 optarg, true); 2355 if (!opts) { 2356 return 1; 2357 } 2358 } break; 2359 case OPTION_IMAGE_OPTS: 2360 image_opts = true; 2361 break; 2362 } 2363 } 2364 if (optind != argc - 1) { 2365 error_exit("Expecting one image file name"); 2366 } 2367 filename = argv[optind++]; 2368 2369 if (output && !strcmp(output, "json")) { 2370 output_format = OFORMAT_JSON; 2371 } else if (output && !strcmp(output, "human")) { 2372 output_format = OFORMAT_HUMAN; 2373 } else if (output) { 2374 error_report("--output must be used with human or json as argument."); 2375 return 1; 2376 } 2377 2378 if (qemu_opts_foreach(&qemu_object_opts, 2379 user_creatable_add_opts_foreach, 2380 NULL, NULL)) { 2381 return 1; 2382 } 2383 2384 list = collect_image_info_list(image_opts, filename, fmt, chain); 2385 if (!list) { 2386 return 1; 2387 } 2388 2389 switch (output_format) { 2390 case OFORMAT_HUMAN: 2391 dump_human_image_info_list(list); 2392 break; 2393 case OFORMAT_JSON: 2394 if (chain) { 2395 dump_json_image_info_list(list); 2396 } else { 2397 dump_json_image_info(list->value); 2398 } 2399 break; 2400 } 2401 2402 qapi_free_ImageInfoList(list); 2403 return 0; 2404 } 2405 2406 static void dump_map_entry(OutputFormat output_format, MapEntry *e, 2407 MapEntry *next) 2408 { 2409 switch (output_format) { 2410 case OFORMAT_HUMAN: 2411 if (e->data && !e->has_offset) { 2412 error_report("File contains external, encrypted or compressed clusters."); 2413 exit(1); 2414 } 2415 if (e->data && !e->zero) { 2416 printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", 2417 e->start, e->length, 2418 e->has_offset ? e->offset : 0, 2419 e->has_filename ? e->filename : ""); 2420 } 2421 /* This format ignores the distinction between 0, ZERO and ZERO|DATA. 2422 * Modify the flags here to allow more coalescing. 2423 */ 2424 if (next && (!next->data || next->zero)) { 2425 next->data = false; 2426 next->zero = true; 2427 } 2428 break; 2429 case OFORMAT_JSON: 2430 printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64"," 2431 " \"depth\": %"PRId64", \"zero\": %s, \"data\": %s", 2432 (e->start == 0 ? "[" : ",\n"), 2433 e->start, e->length, e->depth, 2434 e->zero ? "true" : "false", 2435 e->data ? "true" : "false"); 2436 if (e->has_offset) { 2437 printf(", \"offset\": %"PRId64"", e->offset); 2438 } 2439 putchar('}'); 2440 2441 if (!next) { 2442 printf("]\n"); 2443 } 2444 break; 2445 } 2446 } 2447 2448 static int get_block_status(BlockDriverState *bs, int64_t sector_num, 2449 int nb_sectors, MapEntry *e) 2450 { 2451 int64_t ret; 2452 int depth; 2453 BlockDriverState *file; 2454 bool has_offset; 2455 2456 /* As an optimization, we could cache the current range of unallocated 2457 * clusters in each file of the chain, and avoid querying the same 2458 * range repeatedly. 2459 */ 2460 2461 depth = 0; 2462 for (;;) { 2463 ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors, 2464 &file); 2465 if (ret < 0) { 2466 return ret; 2467 } 2468 assert(nb_sectors); 2469 if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { 2470 break; 2471 } 2472 bs = backing_bs(bs); 2473 if (bs == NULL) { 2474 ret = 0; 2475 break; 2476 } 2477 2478 depth++; 2479 } 2480 2481 has_offset = !!(ret & BDRV_BLOCK_OFFSET_VALID); 2482 2483 *e = (MapEntry) { 2484 .start = sector_num * BDRV_SECTOR_SIZE, 2485 .length = nb_sectors * BDRV_SECTOR_SIZE, 2486 .data = !!(ret & BDRV_BLOCK_DATA), 2487 .zero = !!(ret & BDRV_BLOCK_ZERO), 2488 .offset = ret & BDRV_BLOCK_OFFSET_MASK, 2489 .has_offset = has_offset, 2490 .depth = depth, 2491 .has_filename = file && has_offset, 2492 .filename = file && has_offset ? file->filename : NULL, 2493 }; 2494 2495 return 0; 2496 } 2497 2498 static inline bool entry_mergeable(const MapEntry *curr, const MapEntry *next) 2499 { 2500 if (curr->length == 0) { 2501 return false; 2502 } 2503 if (curr->zero != next->zero || 2504 curr->data != next->data || 2505 curr->depth != next->depth || 2506 curr->has_filename != next->has_filename || 2507 curr->has_offset != next->has_offset) { 2508 return false; 2509 } 2510 if (curr->has_filename && strcmp(curr->filename, next->filename)) { 2511 return false; 2512 } 2513 if (curr->has_offset && curr->offset + curr->length != next->offset) { 2514 return false; 2515 } 2516 return true; 2517 } 2518 2519 static int img_map(int argc, char **argv) 2520 { 2521 int c; 2522 OutputFormat output_format = OFORMAT_HUMAN; 2523 BlockBackend *blk; 2524 BlockDriverState *bs; 2525 const char *filename, *fmt, *output; 2526 int64_t length; 2527 MapEntry curr = { .length = 0 }, next; 2528 int ret = 0; 2529 bool image_opts = false; 2530 2531 fmt = NULL; 2532 output = NULL; 2533 for (;;) { 2534 int option_index = 0; 2535 static const struct option long_options[] = { 2536 {"help", no_argument, 0, 'h'}, 2537 {"format", required_argument, 0, 'f'}, 2538 {"output", required_argument, 0, OPTION_OUTPUT}, 2539 {"object", required_argument, 0, OPTION_OBJECT}, 2540 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 2541 {0, 0, 0, 0} 2542 }; 2543 c = getopt_long(argc, argv, "f:h", 2544 long_options, &option_index); 2545 if (c == -1) { 2546 break; 2547 } 2548 switch (c) { 2549 case '?': 2550 case 'h': 2551 help(); 2552 break; 2553 case 'f': 2554 fmt = optarg; 2555 break; 2556 case OPTION_OUTPUT: 2557 output = optarg; 2558 break; 2559 case OPTION_OBJECT: { 2560 QemuOpts *opts; 2561 opts = qemu_opts_parse_noisily(&qemu_object_opts, 2562 optarg, true); 2563 if (!opts) { 2564 return 1; 2565 } 2566 } break; 2567 case OPTION_IMAGE_OPTS: 2568 image_opts = true; 2569 break; 2570 } 2571 } 2572 if (optind != argc - 1) { 2573 error_exit("Expecting one image file name"); 2574 } 2575 filename = argv[optind]; 2576 2577 if (output && !strcmp(output, "json")) { 2578 output_format = OFORMAT_JSON; 2579 } else if (output && !strcmp(output, "human")) { 2580 output_format = OFORMAT_HUMAN; 2581 } else if (output) { 2582 error_report("--output must be used with human or json as argument."); 2583 return 1; 2584 } 2585 2586 if (qemu_opts_foreach(&qemu_object_opts, 2587 user_creatable_add_opts_foreach, 2588 NULL, NULL)) { 2589 return 1; 2590 } 2591 2592 blk = img_open(image_opts, filename, fmt, 0, false, false); 2593 if (!blk) { 2594 return 1; 2595 } 2596 bs = blk_bs(blk); 2597 2598 if (output_format == OFORMAT_HUMAN) { 2599 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); 2600 } 2601 2602 length = blk_getlength(blk); 2603 while (curr.start + curr.length < length) { 2604 int64_t nsectors_left; 2605 int64_t sector_num; 2606 int n; 2607 2608 sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS; 2609 2610 /* Probe up to 1 GiB at a time. */ 2611 nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num; 2612 n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left); 2613 ret = get_block_status(bs, sector_num, n, &next); 2614 2615 if (ret < 0) { 2616 error_report("Could not read file metadata: %s", strerror(-ret)); 2617 goto out; 2618 } 2619 2620 if (entry_mergeable(&curr, &next)) { 2621 curr.length += next.length; 2622 continue; 2623 } 2624 2625 if (curr.length > 0) { 2626 dump_map_entry(output_format, &curr, &next); 2627 } 2628 curr = next; 2629 } 2630 2631 dump_map_entry(output_format, &curr, NULL); 2632 2633 out: 2634 blk_unref(blk); 2635 return ret < 0; 2636 } 2637 2638 #define SNAPSHOT_LIST 1 2639 #define SNAPSHOT_CREATE 2 2640 #define SNAPSHOT_APPLY 3 2641 #define SNAPSHOT_DELETE 4 2642 2643 static int img_snapshot(int argc, char **argv) 2644 { 2645 BlockBackend *blk; 2646 BlockDriverState *bs; 2647 QEMUSnapshotInfo sn; 2648 char *filename, *snapshot_name = NULL; 2649 int c, ret = 0, bdrv_oflags; 2650 int action = 0; 2651 qemu_timeval tv; 2652 bool quiet = false; 2653 Error *err = NULL; 2654 bool image_opts = false; 2655 2656 bdrv_oflags = BDRV_O_RDWR; 2657 /* Parse commandline parameters */ 2658 for(;;) { 2659 static const struct option long_options[] = { 2660 {"help", no_argument, 0, 'h'}, 2661 {"object", required_argument, 0, OPTION_OBJECT}, 2662 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 2663 {0, 0, 0, 0} 2664 }; 2665 c = getopt_long(argc, argv, "la:c:d:hq", 2666 long_options, NULL); 2667 if (c == -1) { 2668 break; 2669 } 2670 switch(c) { 2671 case '?': 2672 case 'h': 2673 help(); 2674 return 0; 2675 case 'l': 2676 if (action) { 2677 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2678 return 0; 2679 } 2680 action = SNAPSHOT_LIST; 2681 bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ 2682 break; 2683 case 'a': 2684 if (action) { 2685 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2686 return 0; 2687 } 2688 action = SNAPSHOT_APPLY; 2689 snapshot_name = optarg; 2690 break; 2691 case 'c': 2692 if (action) { 2693 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2694 return 0; 2695 } 2696 action = SNAPSHOT_CREATE; 2697 snapshot_name = optarg; 2698 break; 2699 case 'd': 2700 if (action) { 2701 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2702 return 0; 2703 } 2704 action = SNAPSHOT_DELETE; 2705 snapshot_name = optarg; 2706 break; 2707 case 'q': 2708 quiet = true; 2709 break; 2710 case OPTION_OBJECT: { 2711 QemuOpts *opts; 2712 opts = qemu_opts_parse_noisily(&qemu_object_opts, 2713 optarg, true); 2714 if (!opts) { 2715 return 1; 2716 } 2717 } break; 2718 case OPTION_IMAGE_OPTS: 2719 image_opts = true; 2720 break; 2721 } 2722 } 2723 2724 if (optind != argc - 1) { 2725 error_exit("Expecting one image file name"); 2726 } 2727 filename = argv[optind++]; 2728 2729 if (qemu_opts_foreach(&qemu_object_opts, 2730 user_creatable_add_opts_foreach, 2731 NULL, NULL)) { 2732 return 1; 2733 } 2734 2735 /* Open the image */ 2736 blk = img_open(image_opts, filename, NULL, bdrv_oflags, false, quiet); 2737 if (!blk) { 2738 return 1; 2739 } 2740 bs = blk_bs(blk); 2741 2742 /* Perform the requested action */ 2743 switch(action) { 2744 case SNAPSHOT_LIST: 2745 dump_snapshots(bs); 2746 break; 2747 2748 case SNAPSHOT_CREATE: 2749 memset(&sn, 0, sizeof(sn)); 2750 pstrcpy(sn.name, sizeof(sn.name), snapshot_name); 2751 2752 qemu_gettimeofday(&tv); 2753 sn.date_sec = tv.tv_sec; 2754 sn.date_nsec = tv.tv_usec * 1000; 2755 2756 ret = bdrv_snapshot_create(bs, &sn); 2757 if (ret) { 2758 error_report("Could not create snapshot '%s': %d (%s)", 2759 snapshot_name, ret, strerror(-ret)); 2760 } 2761 break; 2762 2763 case SNAPSHOT_APPLY: 2764 ret = bdrv_snapshot_goto(bs, snapshot_name); 2765 if (ret) { 2766 error_report("Could not apply snapshot '%s': %d (%s)", 2767 snapshot_name, ret, strerror(-ret)); 2768 } 2769 break; 2770 2771 case SNAPSHOT_DELETE: 2772 bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err); 2773 if (err) { 2774 error_reportf_err(err, "Could not delete snapshot '%s': ", 2775 snapshot_name); 2776 ret = 1; 2777 } 2778 break; 2779 } 2780 2781 /* Cleanup */ 2782 blk_unref(blk); 2783 if (ret) { 2784 return 1; 2785 } 2786 return 0; 2787 } 2788 2789 static int img_rebase(int argc, char **argv) 2790 { 2791 BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL; 2792 uint8_t *buf_old = NULL; 2793 uint8_t *buf_new = NULL; 2794 BlockDriverState *bs = NULL; 2795 char *filename; 2796 const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; 2797 int c, flags, src_flags, ret; 2798 bool writethrough, src_writethrough; 2799 int unsafe = 0; 2800 int progress = 0; 2801 bool quiet = false; 2802 Error *local_err = NULL; 2803 bool image_opts = false; 2804 2805 /* Parse commandline parameters */ 2806 fmt = NULL; 2807 cache = BDRV_DEFAULT_CACHE; 2808 src_cache = BDRV_DEFAULT_CACHE; 2809 out_baseimg = NULL; 2810 out_basefmt = NULL; 2811 for(;;) { 2812 static const struct option long_options[] = { 2813 {"help", no_argument, 0, 'h'}, 2814 {"object", required_argument, 0, OPTION_OBJECT}, 2815 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 2816 {0, 0, 0, 0} 2817 }; 2818 c = getopt_long(argc, argv, "hf:F:b:upt:T:q", 2819 long_options, NULL); 2820 if (c == -1) { 2821 break; 2822 } 2823 switch(c) { 2824 case '?': 2825 case 'h': 2826 help(); 2827 return 0; 2828 case 'f': 2829 fmt = optarg; 2830 break; 2831 case 'F': 2832 out_basefmt = optarg; 2833 break; 2834 case 'b': 2835 out_baseimg = optarg; 2836 break; 2837 case 'u': 2838 unsafe = 1; 2839 break; 2840 case 'p': 2841 progress = 1; 2842 break; 2843 case 't': 2844 cache = optarg; 2845 break; 2846 case 'T': 2847 src_cache = optarg; 2848 break; 2849 case 'q': 2850 quiet = true; 2851 break; 2852 case OPTION_OBJECT: { 2853 QemuOpts *opts; 2854 opts = qemu_opts_parse_noisily(&qemu_object_opts, 2855 optarg, true); 2856 if (!opts) { 2857 return 1; 2858 } 2859 } break; 2860 case OPTION_IMAGE_OPTS: 2861 image_opts = true; 2862 break; 2863 } 2864 } 2865 2866 if (quiet) { 2867 progress = 0; 2868 } 2869 2870 if (optind != argc - 1) { 2871 error_exit("Expecting one image file name"); 2872 } 2873 if (!unsafe && !out_baseimg) { 2874 error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); 2875 } 2876 filename = argv[optind++]; 2877 2878 if (qemu_opts_foreach(&qemu_object_opts, 2879 user_creatable_add_opts_foreach, 2880 NULL, NULL)) { 2881 return 1; 2882 } 2883 2884 qemu_progress_init(progress, 2.0); 2885 qemu_progress_print(0, 100); 2886 2887 flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); 2888 ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); 2889 if (ret < 0) { 2890 error_report("Invalid cache option: %s", cache); 2891 goto out; 2892 } 2893 2894 src_flags = 0; 2895 ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough); 2896 if (ret < 0) { 2897 error_report("Invalid source cache option: %s", src_cache); 2898 goto out; 2899 } 2900 2901 /* The source files are opened read-only, don't care about WCE */ 2902 assert((src_flags & BDRV_O_RDWR) == 0); 2903 (void) src_writethrough; 2904 2905 /* 2906 * Open the images. 2907 * 2908 * Ignore the old backing file for unsafe rebase in case we want to correct 2909 * the reference to a renamed or moved backing file. 2910 */ 2911 blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); 2912 if (!blk) { 2913 ret = -1; 2914 goto out; 2915 } 2916 bs = blk_bs(blk); 2917 2918 if (out_basefmt != NULL) { 2919 if (bdrv_find_format(out_basefmt) == NULL) { 2920 error_report("Invalid format name: '%s'", out_basefmt); 2921 ret = -1; 2922 goto out; 2923 } 2924 } 2925 2926 /* For safe rebasing we need to compare old and new backing file */ 2927 if (!unsafe) { 2928 char backing_name[PATH_MAX]; 2929 QDict *options = NULL; 2930 2931 if (bs->backing_format[0] != '\0') { 2932 options = qdict_new(); 2933 qdict_put(options, "driver", qstring_from_str(bs->backing_format)); 2934 } 2935 2936 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2937 blk_old_backing = blk_new_open(backing_name, NULL, 2938 options, src_flags, &local_err); 2939 if (!blk_old_backing) { 2940 error_reportf_err(local_err, 2941 "Could not open old backing file '%s': ", 2942 backing_name); 2943 goto out; 2944 } 2945 2946 if (out_baseimg[0]) { 2947 if (out_basefmt) { 2948 options = qdict_new(); 2949 qdict_put(options, "driver", qstring_from_str(out_basefmt)); 2950 } else { 2951 options = NULL; 2952 } 2953 2954 blk_new_backing = blk_new_open(out_baseimg, NULL, 2955 options, src_flags, &local_err); 2956 if (!blk_new_backing) { 2957 error_reportf_err(local_err, 2958 "Could not open new backing file '%s': ", 2959 out_baseimg); 2960 goto out; 2961 } 2962 } 2963 } 2964 2965 /* 2966 * Check each unallocated cluster in the COW file. If it is unallocated, 2967 * accesses go to the backing file. We must therefore compare this cluster 2968 * in the old and new backing file, and if they differ we need to copy it 2969 * from the old backing file into the COW file. 2970 * 2971 * If qemu-img crashes during this step, no harm is done. The content of 2972 * the image is the same as the original one at any time. 2973 */ 2974 if (!unsafe) { 2975 int64_t num_sectors; 2976 int64_t old_backing_num_sectors; 2977 int64_t new_backing_num_sectors = 0; 2978 uint64_t sector; 2979 int n; 2980 float local_progress = 0; 2981 2982 buf_old = blk_blockalign(blk, IO_BUF_SIZE); 2983 buf_new = blk_blockalign(blk, IO_BUF_SIZE); 2984 2985 num_sectors = blk_nb_sectors(blk); 2986 if (num_sectors < 0) { 2987 error_report("Could not get size of '%s': %s", 2988 filename, strerror(-num_sectors)); 2989 ret = -1; 2990 goto out; 2991 } 2992 old_backing_num_sectors = blk_nb_sectors(blk_old_backing); 2993 if (old_backing_num_sectors < 0) { 2994 char backing_name[PATH_MAX]; 2995 2996 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2997 error_report("Could not get size of '%s': %s", 2998 backing_name, strerror(-old_backing_num_sectors)); 2999 ret = -1; 3000 goto out; 3001 } 3002 if (blk_new_backing) { 3003 new_backing_num_sectors = blk_nb_sectors(blk_new_backing); 3004 if (new_backing_num_sectors < 0) { 3005 error_report("Could not get size of '%s': %s", 3006 out_baseimg, strerror(-new_backing_num_sectors)); 3007 ret = -1; 3008 goto out; 3009 } 3010 } 3011 3012 if (num_sectors != 0) { 3013 local_progress = (float)100 / 3014 (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512)); 3015 } 3016 3017 for (sector = 0; sector < num_sectors; sector += n) { 3018 3019 /* How many sectors can we handle with the next read? */ 3020 if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { 3021 n = (IO_BUF_SIZE / 512); 3022 } else { 3023 n = num_sectors - sector; 3024 } 3025 3026 /* If the cluster is allocated, we don't need to take action */ 3027 ret = bdrv_is_allocated(bs, sector, n, &n); 3028 if (ret < 0) { 3029 error_report("error while reading image metadata: %s", 3030 strerror(-ret)); 3031 goto out; 3032 } 3033 if (ret) { 3034 continue; 3035 } 3036 3037 /* 3038 * Read old and new backing file and take into consideration that 3039 * backing files may be smaller than the COW image. 3040 */ 3041 if (sector >= old_backing_num_sectors) { 3042 memset(buf_old, 0, n * BDRV_SECTOR_SIZE); 3043 } else { 3044 if (sector + n > old_backing_num_sectors) { 3045 n = old_backing_num_sectors - sector; 3046 } 3047 3048 ret = blk_pread(blk_old_backing, sector << BDRV_SECTOR_BITS, 3049 buf_old, n << BDRV_SECTOR_BITS); 3050 if (ret < 0) { 3051 error_report("error while reading from old backing file"); 3052 goto out; 3053 } 3054 } 3055 3056 if (sector >= new_backing_num_sectors || !blk_new_backing) { 3057 memset(buf_new, 0, n * BDRV_SECTOR_SIZE); 3058 } else { 3059 if (sector + n > new_backing_num_sectors) { 3060 n = new_backing_num_sectors - sector; 3061 } 3062 3063 ret = blk_pread(blk_new_backing, sector << BDRV_SECTOR_BITS, 3064 buf_new, n << BDRV_SECTOR_BITS); 3065 if (ret < 0) { 3066 error_report("error while reading from new backing file"); 3067 goto out; 3068 } 3069 } 3070 3071 /* If they differ, we need to write to the COW file */ 3072 uint64_t written = 0; 3073 3074 while (written < n) { 3075 int pnum; 3076 3077 if (compare_sectors(buf_old + written * 512, 3078 buf_new + written * 512, n - written, &pnum)) 3079 { 3080 ret = blk_pwrite(blk, 3081 (sector + written) << BDRV_SECTOR_BITS, 3082 buf_old + written * 512, 3083 pnum << BDRV_SECTOR_BITS, 0); 3084 if (ret < 0) { 3085 error_report("Error while writing to COW image: %s", 3086 strerror(-ret)); 3087 goto out; 3088 } 3089 } 3090 3091 written += pnum; 3092 } 3093 qemu_progress_print(local_progress, 100); 3094 } 3095 } 3096 3097 /* 3098 * Change the backing file. All clusters that are different from the old 3099 * backing file are overwritten in the COW file now, so the visible content 3100 * doesn't change when we switch the backing file. 3101 */ 3102 if (out_baseimg && *out_baseimg) { 3103 ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); 3104 } else { 3105 ret = bdrv_change_backing_file(bs, NULL, NULL); 3106 } 3107 3108 if (ret == -ENOSPC) { 3109 error_report("Could not change the backing file to '%s': No " 3110 "space left in the file header", out_baseimg); 3111 } else if (ret < 0) { 3112 error_report("Could not change the backing file to '%s': %s", 3113 out_baseimg, strerror(-ret)); 3114 } 3115 3116 qemu_progress_print(100, 0); 3117 /* 3118 * TODO At this point it is possible to check if any clusters that are 3119 * allocated in the COW file are the same in the backing file. If so, they 3120 * could be dropped from the COW file. Don't do this before switching the 3121 * backing file, in case of a crash this would lead to corruption. 3122 */ 3123 out: 3124 qemu_progress_end(); 3125 /* Cleanup */ 3126 if (!unsafe) { 3127 blk_unref(blk_old_backing); 3128 blk_unref(blk_new_backing); 3129 } 3130 qemu_vfree(buf_old); 3131 qemu_vfree(buf_new); 3132 3133 blk_unref(blk); 3134 if (ret) { 3135 return 1; 3136 } 3137 return 0; 3138 } 3139 3140 static int img_resize(int argc, char **argv) 3141 { 3142 Error *err = NULL; 3143 int c, ret, relative; 3144 const char *filename, *fmt, *size; 3145 int64_t n, total_size; 3146 bool quiet = false; 3147 BlockBackend *blk = NULL; 3148 QemuOpts *param; 3149 3150 static QemuOptsList resize_options = { 3151 .name = "resize_options", 3152 .head = QTAILQ_HEAD_INITIALIZER(resize_options.head), 3153 .desc = { 3154 { 3155 .name = BLOCK_OPT_SIZE, 3156 .type = QEMU_OPT_SIZE, 3157 .help = "Virtual disk size" 3158 }, { 3159 /* end of list */ 3160 } 3161 }, 3162 }; 3163 bool image_opts = false; 3164 3165 /* Remove size from argv manually so that negative numbers are not treated 3166 * as options by getopt. */ 3167 if (argc < 3) { 3168 error_exit("Not enough arguments"); 3169 return 1; 3170 } 3171 3172 size = argv[--argc]; 3173 3174 /* Parse getopt arguments */ 3175 fmt = NULL; 3176 for(;;) { 3177 static const struct option long_options[] = { 3178 {"help", no_argument, 0, 'h'}, 3179 {"object", required_argument, 0, OPTION_OBJECT}, 3180 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 3181 {0, 0, 0, 0} 3182 }; 3183 c = getopt_long(argc, argv, "f:hq", 3184 long_options, NULL); 3185 if (c == -1) { 3186 break; 3187 } 3188 switch(c) { 3189 case '?': 3190 case 'h': 3191 help(); 3192 break; 3193 case 'f': 3194 fmt = optarg; 3195 break; 3196 case 'q': 3197 quiet = true; 3198 break; 3199 case OPTION_OBJECT: { 3200 QemuOpts *opts; 3201 opts = qemu_opts_parse_noisily(&qemu_object_opts, 3202 optarg, true); 3203 if (!opts) { 3204 return 1; 3205 } 3206 } break; 3207 case OPTION_IMAGE_OPTS: 3208 image_opts = true; 3209 break; 3210 } 3211 } 3212 if (optind != argc - 1) { 3213 error_exit("Expecting one image file name"); 3214 } 3215 filename = argv[optind++]; 3216 3217 if (qemu_opts_foreach(&qemu_object_opts, 3218 user_creatable_add_opts_foreach, 3219 NULL, NULL)) { 3220 return 1; 3221 } 3222 3223 /* Choose grow, shrink, or absolute resize mode */ 3224 switch (size[0]) { 3225 case '+': 3226 relative = 1; 3227 size++; 3228 break; 3229 case '-': 3230 relative = -1; 3231 size++; 3232 break; 3233 default: 3234 relative = 0; 3235 break; 3236 } 3237 3238 /* Parse size */ 3239 param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); 3240 qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err); 3241 if (err) { 3242 error_report_err(err); 3243 ret = -1; 3244 qemu_opts_del(param); 3245 goto out; 3246 } 3247 n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); 3248 qemu_opts_del(param); 3249 3250 blk = img_open(image_opts, filename, fmt, 3251 BDRV_O_RDWR, false, quiet); 3252 if (!blk) { 3253 ret = -1; 3254 goto out; 3255 } 3256 3257 if (relative) { 3258 total_size = blk_getlength(blk) + n * relative; 3259 } else { 3260 total_size = n; 3261 } 3262 if (total_size <= 0) { 3263 error_report("New image size must be positive"); 3264 ret = -1; 3265 goto out; 3266 } 3267 3268 ret = blk_truncate(blk, total_size); 3269 switch (ret) { 3270 case 0: 3271 qprintf(quiet, "Image resized.\n"); 3272 break; 3273 case -ENOTSUP: 3274 error_report("This image does not support resize"); 3275 break; 3276 case -EACCES: 3277 error_report("Image is read-only"); 3278 break; 3279 default: 3280 error_report("Error resizing image (%d)", -ret); 3281 break; 3282 } 3283 out: 3284 blk_unref(blk); 3285 if (ret) { 3286 return 1; 3287 } 3288 return 0; 3289 } 3290 3291 static void amend_status_cb(BlockDriverState *bs, 3292 int64_t offset, int64_t total_work_size, 3293 void *opaque) 3294 { 3295 qemu_progress_print(100.f * offset / total_work_size, 0); 3296 } 3297 3298 static int img_amend(int argc, char **argv) 3299 { 3300 Error *err = NULL; 3301 int c, ret = 0; 3302 char *options = NULL; 3303 QemuOptsList *create_opts = NULL; 3304 QemuOpts *opts = NULL; 3305 const char *fmt = NULL, *filename, *cache; 3306 int flags; 3307 bool writethrough; 3308 bool quiet = false, progress = false; 3309 BlockBackend *blk = NULL; 3310 BlockDriverState *bs = NULL; 3311 bool image_opts = false; 3312 3313 cache = BDRV_DEFAULT_CACHE; 3314 for (;;) { 3315 static const struct option long_options[] = { 3316 {"help", no_argument, 0, 'h'}, 3317 {"object", required_argument, 0, OPTION_OBJECT}, 3318 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 3319 {0, 0, 0, 0} 3320 }; 3321 c = getopt_long(argc, argv, "ho:f:t:pq", 3322 long_options, NULL); 3323 if (c == -1) { 3324 break; 3325 } 3326 3327 switch (c) { 3328 case 'h': 3329 case '?': 3330 help(); 3331 break; 3332 case 'o': 3333 if (!is_valid_option_list(optarg)) { 3334 error_report("Invalid option list: %s", optarg); 3335 ret = -1; 3336 goto out_no_progress; 3337 } 3338 if (!options) { 3339 options = g_strdup(optarg); 3340 } else { 3341 char *old_options = options; 3342 options = g_strdup_printf("%s,%s", options, optarg); 3343 g_free(old_options); 3344 } 3345 break; 3346 case 'f': 3347 fmt = optarg; 3348 break; 3349 case 't': 3350 cache = optarg; 3351 break; 3352 case 'p': 3353 progress = true; 3354 break; 3355 case 'q': 3356 quiet = true; 3357 break; 3358 case OPTION_OBJECT: 3359 opts = qemu_opts_parse_noisily(&qemu_object_opts, 3360 optarg, true); 3361 if (!opts) { 3362 ret = -1; 3363 goto out_no_progress; 3364 } 3365 break; 3366 case OPTION_IMAGE_OPTS: 3367 image_opts = true; 3368 break; 3369 } 3370 } 3371 3372 if (!options) { 3373 error_exit("Must specify options (-o)"); 3374 } 3375 3376 if (qemu_opts_foreach(&qemu_object_opts, 3377 user_creatable_add_opts_foreach, 3378 NULL, NULL)) { 3379 ret = -1; 3380 goto out_no_progress; 3381 } 3382 3383 if (quiet) { 3384 progress = false; 3385 } 3386 qemu_progress_init(progress, 1.0); 3387 3388 filename = (optind == argc - 1) ? argv[argc - 1] : NULL; 3389 if (fmt && has_help_option(options)) { 3390 /* If a format is explicitly specified (and possibly no filename is 3391 * given), print option help here */ 3392 ret = print_block_option_help(filename, fmt); 3393 goto out; 3394 } 3395 3396 if (optind != argc - 1) { 3397 error_report("Expecting one image file name"); 3398 ret = -1; 3399 goto out; 3400 } 3401 3402 flags = BDRV_O_RDWR; 3403 ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); 3404 if (ret < 0) { 3405 error_report("Invalid cache option: %s", cache); 3406 goto out; 3407 } 3408 3409 blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); 3410 if (!blk) { 3411 ret = -1; 3412 goto out; 3413 } 3414 bs = blk_bs(blk); 3415 3416 fmt = bs->drv->format_name; 3417 3418 if (has_help_option(options)) { 3419 /* If the format was auto-detected, print option help here */ 3420 ret = print_block_option_help(filename, fmt); 3421 goto out; 3422 } 3423 3424 if (!bs->drv->create_opts) { 3425 error_report("Format driver '%s' does not support any options to amend", 3426 fmt); 3427 ret = -1; 3428 goto out; 3429 } 3430 3431 create_opts = qemu_opts_append(create_opts, bs->drv->create_opts); 3432 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 3433 if (options) { 3434 qemu_opts_do_parse(opts, options, NULL, &err); 3435 if (err) { 3436 error_report_err(err); 3437 ret = -1; 3438 goto out; 3439 } 3440 } 3441 3442 /* In case the driver does not call amend_status_cb() */ 3443 qemu_progress_print(0.f, 0); 3444 ret = bdrv_amend_options(bs, opts, &amend_status_cb, NULL); 3445 qemu_progress_print(100.f, 0); 3446 if (ret < 0) { 3447 error_report("Error while amending options: %s", strerror(-ret)); 3448 goto out; 3449 } 3450 3451 out: 3452 qemu_progress_end(); 3453 3454 out_no_progress: 3455 blk_unref(blk); 3456 qemu_opts_del(opts); 3457 qemu_opts_free(create_opts); 3458 g_free(options); 3459 3460 if (ret) { 3461 return 1; 3462 } 3463 return 0; 3464 } 3465 3466 typedef struct BenchData { 3467 BlockBackend *blk; 3468 uint64_t image_size; 3469 bool write; 3470 int bufsize; 3471 int step; 3472 int nrreq; 3473 int n; 3474 int flush_interval; 3475 bool drain_on_flush; 3476 uint8_t *buf; 3477 QEMUIOVector *qiov; 3478 3479 int in_flight; 3480 bool in_flush; 3481 uint64_t offset; 3482 } BenchData; 3483 3484 static void bench_undrained_flush_cb(void *opaque, int ret) 3485 { 3486 if (ret < 0) { 3487 error_report("Failed flush request: %s\n", strerror(-ret)); 3488 exit(EXIT_FAILURE); 3489 } 3490 } 3491 3492 static void bench_cb(void *opaque, int ret) 3493 { 3494 BenchData *b = opaque; 3495 BlockAIOCB *acb; 3496 3497 if (ret < 0) { 3498 error_report("Failed request: %s\n", strerror(-ret)); 3499 exit(EXIT_FAILURE); 3500 } 3501 3502 if (b->in_flush) { 3503 /* Just finished a flush with drained queue: Start next requests */ 3504 assert(b->in_flight == 0); 3505 b->in_flush = false; 3506 } else if (b->in_flight > 0) { 3507 int remaining = b->n - b->in_flight; 3508 3509 b->n--; 3510 b->in_flight--; 3511 3512 /* Time for flush? Drain queue if requested, then flush */ 3513 if (b->flush_interval && remaining % b->flush_interval == 0) { 3514 if (!b->in_flight || !b->drain_on_flush) { 3515 BlockCompletionFunc *cb; 3516 3517 if (b->drain_on_flush) { 3518 b->in_flush = true; 3519 cb = bench_cb; 3520 } else { 3521 cb = bench_undrained_flush_cb; 3522 } 3523 3524 acb = blk_aio_flush(b->blk, cb, b); 3525 if (!acb) { 3526 error_report("Failed to issue flush request"); 3527 exit(EXIT_FAILURE); 3528 } 3529 } 3530 if (b->drain_on_flush) { 3531 return; 3532 } 3533 } 3534 } 3535 3536 while (b->n > b->in_flight && b->in_flight < b->nrreq) { 3537 if (b->write) { 3538 acb = blk_aio_pwritev(b->blk, b->offset, b->qiov, 0, 3539 bench_cb, b); 3540 } else { 3541 acb = blk_aio_preadv(b->blk, b->offset, b->qiov, 0, 3542 bench_cb, b); 3543 } 3544 if (!acb) { 3545 error_report("Failed to issue request"); 3546 exit(EXIT_FAILURE); 3547 } 3548 b->in_flight++; 3549 b->offset += b->step; 3550 b->offset %= b->image_size; 3551 } 3552 } 3553 3554 static int img_bench(int argc, char **argv) 3555 { 3556 int c, ret = 0; 3557 const char *fmt = NULL, *filename; 3558 bool quiet = false; 3559 bool image_opts = false; 3560 bool is_write = false; 3561 int count = 75000; 3562 int depth = 64; 3563 int64_t offset = 0; 3564 size_t bufsize = 4096; 3565 int pattern = 0; 3566 size_t step = 0; 3567 int flush_interval = 0; 3568 bool drain_on_flush = true; 3569 int64_t image_size; 3570 BlockBackend *blk = NULL; 3571 BenchData data = {}; 3572 int flags = 0; 3573 bool writethrough; 3574 struct timeval t1, t2; 3575 int i; 3576 3577 for (;;) { 3578 static const struct option long_options[] = { 3579 {"help", no_argument, 0, 'h'}, 3580 {"flush-interval", required_argument, 0, OPTION_FLUSH_INTERVAL}, 3581 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 3582 {"pattern", required_argument, 0, OPTION_PATTERN}, 3583 {"no-drain", no_argument, 0, OPTION_NO_DRAIN}, 3584 {0, 0, 0, 0} 3585 }; 3586 c = getopt_long(argc, argv, "hc:d:f:no:qs:S:t:w", long_options, NULL); 3587 if (c == -1) { 3588 break; 3589 } 3590 3591 switch (c) { 3592 case 'h': 3593 case '?': 3594 help(); 3595 break; 3596 case 'c': 3597 { 3598 char *end; 3599 errno = 0; 3600 count = strtoul(optarg, &end, 0); 3601 if (errno || *end || count > INT_MAX) { 3602 error_report("Invalid request count specified"); 3603 return 1; 3604 } 3605 break; 3606 } 3607 case 'd': 3608 { 3609 char *end; 3610 errno = 0; 3611 depth = strtoul(optarg, &end, 0); 3612 if (errno || *end || depth > INT_MAX) { 3613 error_report("Invalid queue depth specified"); 3614 return 1; 3615 } 3616 break; 3617 } 3618 case 'f': 3619 fmt = optarg; 3620 break; 3621 case 'n': 3622 flags |= BDRV_O_NATIVE_AIO; 3623 break; 3624 case 'o': 3625 { 3626 char *end; 3627 errno = 0; 3628 offset = qemu_strtosz_suffix(optarg, &end, 3629 QEMU_STRTOSZ_DEFSUFFIX_B); 3630 if (offset < 0|| *end) { 3631 error_report("Invalid offset specified"); 3632 return 1; 3633 } 3634 break; 3635 } 3636 break; 3637 case 'q': 3638 quiet = true; 3639 break; 3640 case 's': 3641 { 3642 int64_t sval; 3643 char *end; 3644 3645 sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); 3646 if (sval < 0 || sval > INT_MAX || *end) { 3647 error_report("Invalid buffer size specified"); 3648 return 1; 3649 } 3650 3651 bufsize = sval; 3652 break; 3653 } 3654 case 'S': 3655 { 3656 int64_t sval; 3657 char *end; 3658 3659 sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); 3660 if (sval < 0 || sval > INT_MAX || *end) { 3661 error_report("Invalid step size specified"); 3662 return 1; 3663 } 3664 3665 step = sval; 3666 break; 3667 } 3668 case 't': 3669 ret = bdrv_parse_cache_mode(optarg, &flags, &writethrough); 3670 if (ret < 0) { 3671 error_report("Invalid cache mode"); 3672 ret = -1; 3673 goto out; 3674 } 3675 break; 3676 case 'w': 3677 flags |= BDRV_O_RDWR; 3678 is_write = true; 3679 break; 3680 case OPTION_PATTERN: 3681 { 3682 char *end; 3683 errno = 0; 3684 pattern = strtoul(optarg, &end, 0); 3685 if (errno || *end || pattern > 0xff) { 3686 error_report("Invalid pattern byte specified"); 3687 return 1; 3688 } 3689 break; 3690 } 3691 case OPTION_FLUSH_INTERVAL: 3692 { 3693 char *end; 3694 errno = 0; 3695 flush_interval = strtoul(optarg, &end, 0); 3696 if (errno || *end || flush_interval > INT_MAX) { 3697 error_report("Invalid flush interval specified"); 3698 return 1; 3699 } 3700 break; 3701 } 3702 case OPTION_NO_DRAIN: 3703 drain_on_flush = false; 3704 break; 3705 case OPTION_IMAGE_OPTS: 3706 image_opts = true; 3707 break; 3708 } 3709 } 3710 3711 if (optind != argc - 1) { 3712 error_exit("Expecting one image file name"); 3713 } 3714 filename = argv[argc - 1]; 3715 3716 if (!is_write && flush_interval) { 3717 error_report("--flush-interval is only available in write tests"); 3718 ret = -1; 3719 goto out; 3720 } 3721 if (flush_interval && flush_interval < depth) { 3722 error_report("Flush interval can't be smaller than depth"); 3723 ret = -1; 3724 goto out; 3725 } 3726 3727 blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); 3728 if (!blk) { 3729 ret = -1; 3730 goto out; 3731 } 3732 3733 image_size = blk_getlength(blk); 3734 if (image_size < 0) { 3735 ret = image_size; 3736 goto out; 3737 } 3738 3739 data = (BenchData) { 3740 .blk = blk, 3741 .image_size = image_size, 3742 .bufsize = bufsize, 3743 .step = step ?: bufsize, 3744 .nrreq = depth, 3745 .n = count, 3746 .offset = offset, 3747 .write = is_write, 3748 .flush_interval = flush_interval, 3749 .drain_on_flush = drain_on_flush, 3750 }; 3751 printf("Sending %d %s requests, %d bytes each, %d in parallel " 3752 "(starting at offset %" PRId64 ", step size %d)\n", 3753 data.n, data.write ? "write" : "read", data.bufsize, data.nrreq, 3754 data.offset, data.step); 3755 if (flush_interval) { 3756 printf("Sending flush every %d requests\n", flush_interval); 3757 } 3758 3759 data.buf = blk_blockalign(blk, data.nrreq * data.bufsize); 3760 memset(data.buf, pattern, data.nrreq * data.bufsize); 3761 3762 data.qiov = g_new(QEMUIOVector, data.nrreq); 3763 for (i = 0; i < data.nrreq; i++) { 3764 qemu_iovec_init(&data.qiov[i], 1); 3765 qemu_iovec_add(&data.qiov[i], 3766 data.buf + i * data.bufsize, data.bufsize); 3767 } 3768 3769 gettimeofday(&t1, NULL); 3770 bench_cb(&data, 0); 3771 3772 while (data.n > 0) { 3773 main_loop_wait(false); 3774 } 3775 gettimeofday(&t2, NULL); 3776 3777 printf("Run completed in %3.3f seconds.\n", 3778 (t2.tv_sec - t1.tv_sec) 3779 + ((double)(t2.tv_usec - t1.tv_usec) / 1000000)); 3780 3781 out: 3782 qemu_vfree(data.buf); 3783 blk_unref(blk); 3784 3785 if (ret) { 3786 return 1; 3787 } 3788 return 0; 3789 } 3790 3791 3792 static const img_cmd_t img_cmds[] = { 3793 #define DEF(option, callback, arg_string) \ 3794 { option, callback }, 3795 #include "qemu-img-cmds.h" 3796 #undef DEF 3797 #undef GEN_DOCS 3798 { NULL, NULL, }, 3799 }; 3800 3801 int main(int argc, char **argv) 3802 { 3803 const img_cmd_t *cmd; 3804 const char *cmdname; 3805 Error *local_error = NULL; 3806 int c; 3807 static const struct option long_options[] = { 3808 {"help", no_argument, 0, 'h'}, 3809 {"version", no_argument, 0, 'v'}, 3810 {0, 0, 0, 0} 3811 }; 3812 3813 #ifdef CONFIG_POSIX 3814 signal(SIGPIPE, SIG_IGN); 3815 #endif 3816 3817 error_set_progname(argv[0]); 3818 qemu_init_exec_dir(argv[0]); 3819 3820 if (qemu_init_main_loop(&local_error)) { 3821 error_report_err(local_error); 3822 exit(EXIT_FAILURE); 3823 } 3824 3825 qcrypto_init(&error_fatal); 3826 3827 module_call_init(MODULE_INIT_QOM); 3828 bdrv_init(); 3829 if (argc < 2) { 3830 error_exit("Not enough arguments"); 3831 } 3832 cmdname = argv[1]; 3833 3834 qemu_add_opts(&qemu_object_opts); 3835 qemu_add_opts(&qemu_source_opts); 3836 3837 /* find the command */ 3838 for (cmd = img_cmds; cmd->name != NULL; cmd++) { 3839 if (!strcmp(cmdname, cmd->name)) { 3840 return cmd->handler(argc - 1, argv + 1); 3841 } 3842 } 3843 3844 c = getopt_long(argc, argv, "h", long_options, NULL); 3845 3846 if (c == 'h') { 3847 help(); 3848 } 3849 if (c == 'v') { 3850 printf(QEMU_IMG_VERSION); 3851 return 0; 3852 } 3853 3854 /* not found */ 3855 error_exit("Command not found: %s", cmdname); 3856 } 3857